Quote Originally Posted by Emperor Aurelius
P.S.-can I unlock the senate?If so when I play as them is it possible to command roman factions to do stuff like you could do when you got the pope mod to be the pope in medeival total war?
Yup as others have said descr_strat is the text file you need to edit. Just copy and paste the faction names (at the top of the text file) into Playable. Then Delete the entries under Unlockable and Unplayable.

However, you can only view and choose from 20 factions in the new imperial campaign screen. If you have included all factions in the playable list, the last one will not be selectable from the factions list. To solve this, simply leave one faction in the Unplayable section of the descr_strat text file (e.g. Slave).

You will have to increase starting denarii for the Senate and Slave (Rebels) as they lose a lot each turn - think its around 5-8k per turn at the start of a new campaign. The Senate has a couple of starting armies, and with only one starting province to support everything (family members wages', army upkeep etc), debts will soon mount up.

The rebels get plenty of starting provinces, but as you will find, they have hardly any garrisons present, and the AI usually takes a lot of provinces from you within the first few turns. However, Slaves get armies randomly appear on the strategy map every turn or so - problem with this is that it increases army upkeep.

You will get CTDs if you click some of the tabs/buttons when playing as Senate/Slave. Stay away from Senate tab when playing Senate, also don't click next/previous unit buttons (near the campaign date, bottom right).