There is an option on Windows Vista (as in every Windows) that you run some program
under so called "Compatibility Mode" for some other Windows.
So, you can (maybe) run some program than usually won't work on Vista.
Follow these steps:
1) Click on the icon of the program or game you want to run, choose Properties.
2) Click the Compatibility tab, check the box "Run this program in compatibility
mode for:", and choose the version of Windows you wan't to run compatibility mode
in.
(As optional, you can check "Run this program as an administrator".)
3) Try to run the program...
