All,
I am designing a game called SteamPunk Crescendo. The setting is a mix of Steampunk, Magic, super science, industrial revolution, dystopia and most importantly, vampires.

What follows is an incomplete list of some of the major players of the day in alphabetical order.

Legend:
Vampire origin: This reflects whether the group's leaders have an idea of the link between Rom and Vampires. The entire group may or may not know and individual members may always be an exception.
Vampires: Most people in the world of SPC know about the existence of vampires. This description generally indicates if the group is opposed to the existence of vampires and/or their agendas.
Rom: Some groups harbor a prejudice against the Rom and their associates. Again, individual members may prove to be an exception.
Gaze: This is the term Rom use for outsiders, meaning non-Romani individuals. This entry indicates the group's general attitudes towards non-Romani individuals.
Allies: This is a list of groups that are allied with or at least compatible with this group. Again, some individuals may stray from the group's general preferences. Allies are listed from strongest, truest alliance at the beginning of the list with weaker alliances and mere compatibilities listed last.
Enemies: Again, the most hated enemies are listed first while the end of the list might just be a group that is incompatible with this group.

Boomers - Prospectors, Claim Jumpers and Entrepreneurs. Men and women that have felt the winds of change and adapted accordingly.
Vampire origin: Ignorant
Vampires: Opposed
Rom: Dislike
Gaze: Interested
Allies: Wild Bunch, Royal Society, Republicans, Cabal
Enemies: Rail Barons, Church of England, Pobratimo, Illuminati, Mafia

Cabal - Group of Sorcerers and advisers. They trade in knowledge of magic, and aid each other in times of need.
Vampire origin: Know
Vampires: Opposed
Rom: Dislike
Gaze: Interested
Allies: Wicca, Sindo, Trailblazers, Boomers
Enemies: Mafia, Drakes, Regulators, Rroma, Rail Barons

Church of England - In this era, the Anglican Church is aggressively expanding. People feel like they need help and the Church is there to provide it.
Vampire origin: Know
Vampires: Not opposed
Rom: Accepting
Gaze: Interested
Allies: Rail Barons, Trailblazers, Sindo, Drakes
Enemies: Wild Bunch, Boomers, Rroma, Regulators, Wicca

Drakes - A group of Vampires sworn to protect ordinary people. Even though they have turned, they try to use their powers to defend those weaker than themselves.
Vampire origin: Ignorant
Vampires: Not opposed
Rom: Accepting
Gaze: Interested
Allies: Mafia, Republicans, Royal Society, Church of England
Enemies: Wicca, Cabal, Illuminati, Pobratimo, Wild Bunch

Illuminati - A Secret society dedicated to discovering the true nature of creation.
Vampire origin: Know
Vampires: Opposed
Rom: Accepting
Gaze: None
Allies: Sindo, Wicca, Rail Barons, Rroma
Enemies: Republicans, Regulators, Drakes, Boomers, Trailblazers

Mafia - Organized Crime Syndicate. The mafia is cultivating their influence into every town that is benefiting from the new economy.
Vampire origin: Ignorant
Vampires: Not opposed
Rom: Accepting
Gaze: None
Allies: Drakes, Regulators, Rroma, Rail Barons
Enemies: Cabal, Wicca, Sindo, Trailblazers, Boomers

Pobratimo - Vampires dedicated to feeding on the weak. Some feel that it will end the curse sooner, but most just revel in the thrill of it all.
Vampire origin: Know
Vampires: Not opposed
Rom: Dislike
Gaze: None
Allies: Trailblazers, Rail Barons, Wicca, Regulators
Enemies: Royal Society, Rroma, Boomers, Drakes, Sindo

Rail Barons - Monopolistic conspiracy of industrial leaders. Of course, this does not just refer to rail tycoons. But all industrialists who are making millions off of the sweat of poor people.
Vampire origin: Know
Vampires: Not opposed
Rom: Accepting
Gaze: None
Allies: Church of England, Pobratimo, Illuminati, Mafia
Enemies: Boomers, Wild Bunch, Royal Society, Republicans, Cabal

Regulators - This is a group of Ex-military personnel, Bounty hunters, Mercenaries & hired guns. They find work however they can, legal or otherwise.
Vampire origin: Ignorant
Vampires: Not opposed
Rom: Dislike
Gaze: None
Allies: Republicans, Mafia, Wild Bunch, Pobratimo
Enemies: Sindo, Illuminati, Cabal, Church of England, Royal Society

Republicans - Inner circle of the Government. Works to serve their own agenda at the expense of all others.
Vampire origin: Ignorant
Vampires: Not opposed
Rom: Dislike
Gaze: Interested
Allies: Regulators, Drakes, Boomers, Trailblazers
Enemies: Illuminati, Sindo, Wicca, Rail Barons, Rroma

Royal Societies - Inventors, Scholars and Scientists. These groups have existed for over 200 years. It is a meeting of minds that probe into the mysteries of the universe.
Vampire origin: Ignorant
Vampires: Opposed
Rom: Accepting
Gaze: Interested
Allies: Rroma, Boomers, Drakes, Sindo
Enemies: Pobratimo, Trailblazers, Rail Barons, Wicca, Regulators

Rroma - Group of Rom who are trying to affect changes in order to adapt in this new world.
Vampire origin: Ignorant
Vampires: Opposed
Rom: Accepting
Gaze: None
Allies: Royal Society, Wild Bunch, Mafia, Illuminati
Enemies: Trailblazers, Pobratimo, Church of England, Cabal, Republicans

Sindo - A group of Rom who are trying to preserve the old ways.
Vampire origin: Know
Vampires: Opposed
Rom: Accepting
Gaze: Interested
Allies: Illuminati, Cabal, Church of England, Royal society
Enemies: Regulators, Republicans, Mafia, Wild Bunch, Pobratimo

Trailblazers - Elite Military Officers working to create and maintain a Military Industrial Complex. They just want to safeguard their homeland with the best men, training and technology.
Vampire origin: Know
Vampires: Not opposed
Rom: Dislike
Gaze: Interested
Allies: Pobratimo, Church of England, Cabal, Republicans
Enemies: Rroma, Royal Society, Wild Bunch, Mafia, Illuminati

Wicca - A nature worship cult imbued with magic powers. They believe in the equality of all beings.
Vampire origin: Know
Vampires: Opposed
Rom: Dislike
Gaze: None
Allies: Cabal, Illuminati, Pobratimo, Wild Bunch
Enemies: Drakes, Mafia, Republicans, Royal Society, Church of England

Wild Bunch - One of several gangs terrorizing the open road. These bandits jump any travelers that appear weaker than they are.
Vampire origin: Ignorant
Vampires: Opposed
Rom: Dislike
Gaze: None
Allies: Boomers, Rroma, Regulators, Wicca
Enemies: Church of England, Rail Barons, Trailblazers, Sindo, Drakes

What needs expansion? Who is obviously missing? Who deserves extra special attention?
Dave M

I don't have any room to critique your idea as a whole, but why do the Barons and Trailblazers know about the origin of vampires yet Drakes don't? Other than that it just seems to have a lot going on which can be fine, but you seem to run the risk of unbridled chaos.

Sadique,,
So, there were two driving reasons behind the answer to your question:
1) I wanted the groups to know to be the ones that were focused on strategic goals and large scale plans. While the groups that were ignorant would be those that were focused on action. In reeality, some Drakes have done the work to figure out what caused them to turn, but most are too busy fighting the bad guys and their own thirst to take that kind of time to look into it.
2) The Factors that are listed here like "Vampire Orign: Know/Ignorant" were used to create a faction alignment system, so that across all the groups, none of them have the same set of factors and this is how the allies/enemies list was generated.

Since then, I have done expanded write ups:
Drakes - A group of Vampires sworn to protect ordinary people. Even though they have turned, they try to use their powers to defend those weaker than themselves.
Most Drakes know nothing about the origin of the Vampire curse, even those versed in the mystic arts. Some haven't even made the connection between temptation and manifesting powers.
Many Drakes will attempt to mentor vampires they meet. Recruiting them into the Ordinul Dragonului. Even if the newly met vampire refuses to join, they will be supported and respected, so long as they do not take advantage of the weak and defenseless.
As Rom and ex-Rom, Drakes do all they can to ease the suffering of their brethren.
Drakes have already succumbed to temptation, so the potential corruption of interacting with an unclean Gadje holds no sway over them.
Factions:
Impalers - The most powerful vampires form into groups of Impalers and take on the most challenging enemies. Cross them at your own risk.
Jakhe - These are the scouts of the Drakes. They look everywhere, leaving no stone unturned. Many Jakhe die for their curiousness.
Drakelings - New Drakes who have not found their niche. Most are harmless, except for those that have something to prove.

Knowledge of vampire origin: Ignorant
Compatible with Vampires: Not opposed
Attitudes towards Rom: Accepting
Acceptance of Gadje: Interested
Allies: Mafia, Republicans, Royal Society, Church of England
Enemies: Wicca, Cabal, Illuminati, Pobratimo, Wild Bunch

Rail Barons - Monopolistic conspiracy of industrial leaders. Of course, this does not just refer to rail tycoons. But all industrialists who are making millions off of the sweat of poor people.
Some robber barons, or their advisers, know about the secret curse of the Sudija.
Robber barons do not care if the people they do business with are vampires.
They don't know or care about the insular nature of the Rom.
They do not look to cultivate relationships with Gadje, unless there is a profit in it.
Factions:
Rail Barons - They are buying land and working indentured servants in order to build their empire.
Oil Barons - The potential for oil is just being discovered and these men are exploiting that fact.
Real Estate Moguls - Some times they take advantage of others' misfortunes, other times, they create that misfortune in order to expand their empires.

Knowledge of vampire origin: Know
Compatible with Vampires: Not opposed
Attitudes towards Rom: Accepting
Acceptance of Gadje: None
Allies: Church of England, Pobratimo, Illuminati, Mafia
Enemies: Boomers, Wild Bunch, Royal Society, Republicans, Cabal

Trailblazers - Elite Military Officers working to create and maintain a Military Industrial Complex. They just want to safeguard their homeland with the best men, training and technology.
Only the most elite members of the Trailblazers know of the true origin of Vampires. But the hierarchical nature of the Trailblazers assure that all actions of their members are influenced by this knowledge.
Trailblazers hope that, some day, Vampires will take up arms in the names of their armed forces.
Trailblazers dislike all Rom that dislike them.
Defending the Gadje and cooperative Rom is the only guiding light for the Trailblazers.
Factions:
Dividers - These architects of the future of the military see their efforts through the lens of technology alone. Men and training are only needed to make the technology work.
Drillers - They work tirelessly to improve the training of military personnel.
Scouts - These Trailblazers are always on the look out for new talent.

Knowledge of vampire origin: Know
Compatible with Vampires: Not opposed
Attitudes towards Rom: Dislike
Acceptance of Gadje: Interested
Allies: Pobratimo, Church of England, Cabal, Republicans
Enemies: Rroma, Royal Society, Wild Bunch, Mafia, Illuminati

Do these help explain it better?

This was what I was looking for, so yes. It just seemed odd that their entire group would know about the origins of vampires. I guess I still don't feel that they deserve a 'know' any more than other groups since there will almost always be higher ups that are informed on the dark truths of the world. In fact, and this may just be from little knowledge of your world ideals, it seems that groups such as Wild Ones would be more likely to spread the information to all the ranks, not implying they should know it, whereas a greed driven corporation would keep such secrets hidden from all others including those in their company.