I don't know what all that means... but I karma'd you anyway. 
Since i have had my coffee and are rather in a good mood this morning i will try to explain what i meens right here.
Why i do not know and how i do not know, but i do know that you need these here selections to make the car,windows, and interior windows show as they should in game.
You should try it m8, it is damn fun, and skinning has never been easier then it is in Race07.
DXT1 no alpha is needed cause if you choose with alpha tha car will probably only show as black or white.(i learned that by mistake)
Also when making the .INI file and putting your stuff in there, remember to name then right. i did the mistake of putting int windows where normal windos should be and vice versa. that looked very nice when i started the game.
Why i am blabbing along on this???
I have no idea. just lonely i guess.