TheThingIs,
I thought so as well, but the Gamesmusicpacks group, wrote this on pg 3. para 2 of their manual:
"Manual Installation: In your download area we have supplied a .rar file with all the files you need, plus an instruction text file which will take you through the process in 3 easy steps. If you don't like auto installers, have any difficulties with it or perhaps have two installations of VoiceAttack simultaneously for some reason, then manual installation is probably for you. It's quick and simple, follow the instructions provided."
Thus I started "for science'ng" to see if it is possible. Maybe they know something we don't, it would be nice to know how if it is possible.