Well, all the files are where they should be. It seems as if the installer mounts the correct directory. Also, the installer is a custom one which creates a windows executable, which in turn runs through DosBox.
If I try to run it through dosbox itself, I get an error where I can only "restore" or "quit" at the menu, and no sound. There is a patch that should help with this, but it didn't help me.
