Here´s my suggestion: i don´t know exactly how the installer package is mounted on installation CD´s, but if this a RAR archive, you could try that feature of the "recovery record" that comes with WINRAR. The problem is to find someone here who can generate this recovery record from the sounds.rar archive and send to you, or post this file in this forum.
Considering the technical aspects (how this thing works), this file shouldn´t be too big, it depends only on the damage range in sounds.rar file.
I would be glad to give a try and send this to you, but i don´t own the game...
Stay tunned!