I managed to get it installed. The autorun loader pops up with a mini red window when trying to install. Not enough to pick which components/demos you want to install. I found that if I just clicked on the window and hit return that it would start the Sound Forge 7 installer.
Everything was installed properly as far as I can tell, it appears that when loading Sound Forge simply aborts during the load. No idea if there are any logs to be checked to identify this issue or not.