COD4

I just got COD4 and I really like it so far.  My one thought about it and this goes for games in general is that I want more options for button layouts.  I really feel that as gaming has progressed I should be able to completely remap the controller however I wish.  I say that because I really wanted to make the button layout as close to Halo 3 as possible.  I want to make the RB reload my weapon and NOT throw a grenade in COD4.  Just sayin'