timppu: Hmm... Is it possible to install the old and new versions side by side, or is it strictly either-or? Just wondering because at least they both default to the same installation directory (C:\GOG Games\Outcast\), so even if you change that, do they also try to create the same shortcut icons into Start menu and such?
It is also interesting that the remake(?) installer is actually a bit smaller than the old one. Apparently it is not an actual overhaul? I guess I'll see soon enough...
I don't think this should be a problem. The new executable is named outcast 1.1.exe so I think you could install the new version in another directory an try them both to compare. I have not managed to get the music to work in the new version abd I will now test the old if the problem is my PC or the new version of the game.