Yeah, like Faw said.
I already screwed mine up doing that :P But always make a backup copy of whatever you are copying. Or do what I do [or DID, starting after messing up my JJ2 levels], and make a copy of the directory that hasn't been used, and call it your "original files" folder. Then you will have working ones.

-Shellraiser: I will be happy to send it to you when it's done. And yes, hopefully you will enjoy it. PLEASE! ENJOY IT! WAAAHH!!!!!!!
jk,