I bought one from Ebay, and it's pretty cool for PC, but it's not exactly like the arcade version. It's VERSION 1.06 or something like that.
You can't modify the way it works. IE: the keys or inputs.
The CD has to be in the drive all the time. I did copy it, and a copy still works and installs.
As far as I know you can't even run it on ME and 2000, at least as far as I can tell. Every time I have tried to do that with the original disk, it won't work. It might have something to do with the video card or the DirectX version. It will install, but it bombs out with no error message.
It's still real fun, and well worth the <$10 price. But I think the one I got from Ebay is bogus too. The label looks really "dot matrix".