Well, the first thing you've to do is to remove your wine. Chances are that Mandrake shipped with a pretty old version of wine (Mandy is not so new either anymore).
In second, if you are willing to run games, wine will make things pretty difficult sometimes. I recommend winex for games:
As you can see here: http://www.transgaming.com/gamepage.php?gameid=54
Fallout 2 works just fine. If you still want to try with wine, get a new one here:
There might be packages for Mandy 9.1 there.