G'day omega2003,
I would hate to think what size the "THARK03.MW4" file is & would suggest if it represents a whole level that you havent yet played - that its gotta be a reasonable size & one that certainly your email box wouldnt take........ even zipped.....
Regardless....thats not so important....what is important is that this is not really the forum to be asking for game files as GCW is here to help you with Backing up your original copy of the game....
However as you've taken the time to write an essay all I would suggest is that you give ( & presuming you've scratched the underside of the disc & not the surface) a Data recovery program a go like :
Roadkil's Unstoppable Copier or
CD CHECK 2 of the many available that i use.. Try them you just never know..........