I downloaded GTA Underground, 3.0, 3.1 and 3.2 from ModDB. When I run it for the first time, it works like a charm! However, I punched a cop by accident (with my fist, not a melee weapon), and the game crashed.
Then I got an error that my GTA:SA is unsupported, so I downloaded the one from the GTA Underground thread. After that, it shows me this message.
I've tried running it as admin, replacing it with another .exe file, ...
I really want to play GTA:SA with the Underground mod, but, I don't want to wait 10-20 minutes every time for the game, and the patches to be extracted just to play it.
I'm using Windows 7 Ultimate, 64-bit if it helps.