Currently, win 7 Pro 64 bits.
Tried at least with 98, 2000, XP 
Hmm, I was going to suggest firstly to install the games on an older system and then transfer the files to your Windows 7, but you've already tried that it seems. Unless you mean that you attempted to run the game in compatibility modes for those operating systems, which probably wouldn't work. The easiest way to get it onto your 64 bit system would be to directly download the files instead of trying to use the packaged installer.
If you can do that:
Inside the folders, there should be an application file called MAID3DVR_BLEU. Run that to play the game. The introduction movie may not play (the files are inside the game folders though, so you can watch the movies whenever you want). In any case, press [ESC] to skip to a Ubisoft loading screen when you hear music playing or the introduction movie. After that (it should take only a second or so to load on your Windows 7, tahra), the game will start.
Keep in mind that you will need to insert the game disc or use a copy of the ISO image in a virtual drive to actually play.
(maybe you should open a new thread about this? I wonder if there aren't more people out there with the same problem 
)
If you really think so, then I probably could. A quick search shows that the game has been discussed a few times on the forum briefly already. I would really just suggest what I have above for now.
Check your private messages though, tahra. I have included a bit more information for you there.
As far as getting your other older games to work, I would suggest trying to install them on an older system to transfer the files. You could always use a virtual machine to install an older operating system and try that route if you don't have access to an older machine any longer, but that would probably be much more difficult for most people.
