I have been installing skins for my players. Everything was working then suddenly the Terrorist skins changed to make them pink and black checkerboards. I got this with guns before and all i did was remove the file and it was fixed. But that didnt work. I installed another and that didnt help at all.

I can't find anything about it on the internet.

Help me out Pit!
Delete CSS. Reinstall.

Or check your cache. I did mods once, and the cache is where everything is put usually. I do believe so.
I got some good guitars, yo.
Simple. You either put something somewhere is doesn't belong, or the file you downloaded isn't complete. Try re-placing all the files (download the skin again), or just getting different skins for it.

Prob. solved.