Sandvik, the only reason I removed prefix/suffix was that it made no point if you were specifying an entire new name for the files. I mean, all the files will be renamed anyway, so what's the point of adding a prefix and/or a suffix?

The MD5 change is default. It's not conditional in LeechMod. It changes the MD5 of every file regardless of whether you want it to, or not. I'll add that as a conditional parameter in my next update.