Everyone has been borrowing cheats from other sites to put on other sites as if they were their own, and most of these cheats are wrong. You don’t have to create another profile with any special names. Flatout 2 has a feature that allows you to enter codes, its in the "Extras" section of the main menu.

The Only Cheat ive seen work is for 1 mil CR
Enter this code at the code entering panel:

GIVECASH

Its that same code that was used for the original Flatout for 1 mil CR, so id suspect the original Flatout codes may work on this one, though i havent tested that.