Alright, I'm a bit wary to try to help you out, since I've tried to help others to no avail. But I'm gonna try anyway.
First of all, the game is installed from the very beginning, so don't worry about that. Second of all, I've never managed to run this game using VDMSound, despite a lot of attempts, so if I was you I'd drop trying that right away. I've only ever managed to run it using DOSbox, so I'd try that before anything else. You can find instructions
here. If that doesn't work, feel free to ask for more help (I won't be able to help you beyond this, but maybe someone else willl).