Can't Delete

Can som1 tell me how to delete mods from ur Rez folder?
I download the first mod correctly it worked
so I wanted another 1 and did the same thing but still the first mod showed ingame
I tried 2 delete but wen I looked in Rez/UI/mark
no files appear

so can som1 tell me how to get rid of a mod?

uhm wut???

1. download mod works
2. See better mod try 2 use old mod still bein used
3. I try 2 delete old mod
4. Go in crossfire/Rez/UI/mark r watever no files r shown
am I stuck with the first mod? r how do u delete?
Please Help