It depends on if you use the downloads folder or the .packages method to install your CC. You could use the 50/50 method if you have a lot. That involves cutting 50% of the files, and placing them in a folder somewhere else (like your desktop, for example), then running the game. If your sim still has her 'naked' clothes, then the offending file is in that half. You go back to the folder, and cut another half out, and place that in a separate folder (lest they get mixed up with the already cleared ones), and repeat the process until you find which file it is. Obviously, if you open up the game, and your 'naked' clothes are replaced with some generic ones, then the offending file is in the group that was placed in a separate file, and you move the cleared ones into the cleared folder, and move the other lot back (I hope that doesn't sound too convoluted).
[Link removed. -Pam]