New Culture types...

Hi I am interested in knowing if is possible to create a new culture type completely apart from the exhisting ones and assign this one to a faction , for example my idea is to make a new culture type for india and replace so armenia with this faction and give this the indian culture type , so units , buildings etc....

I do not want tought to sacrifice any of the exhisting culture types , if this is possible of course also other cultures could get their style like the nomadic enchampements .....

New cultures cannot be created, no.