Patience is a virtue.
This link should come in handy.
Outside of that, I can't really provide you with much, though we support and encourage modding heavily with the PC versions of the game, consoles tend to stray into a legal grey area, since the methods often involve hacked / chipped consoles that can be used to play pirated version of the (and all) games. My suggestion would be to visit a dedicated forum for this sort of thing.