Doom 2000 *CIH VIRUS FIX* [xx/01]

Looks like our old friend CIH is back with this release by NextGen Warez.
Ok, no big deal, I think we all have AVP now, but just in case here's the fix for those
of u who still don't have this nice proggy.
Just overwrite the file ZDOOM.EXE with the one provided here and that's it.