I was getting errors when running the installer, so what I did was this.
Mount the image with whatever tool. Copy and move over the bunny black folder from the mounted image to whatever directory you want. Then, I used the 1.0 patch that came with the main file (move the patch into the game folder and run it). Then I tried to patch the 1.2 downloaded from here, but it would not run, so I just did the 1.21 hotfix. The patching seems suspect, but I am like 30 hours into the game with no problems except being unable to full screen.