If you still need help fixing the sounds, you need to open the pk3's with a zip program. (Window's built in compressor, Winzip, etc...)
(I don't know how much you know about the pk3 stuff, if you need more help you can search the forums or just ask here.)
Anyways go into the models directory
Open the file named sounds.cfg (it can be opened with Notepad or Wordpad).
Delete the directory structure and leave just the name of the actual characters sound folder, found in the sounds directory.
Save that file back as "sounds.cfg" and zip everything back up.
That should do it, if you have any questions just ask.