If you're running this game under Vista and you're experiencing stuttering gameplay, you need to change some settings on the file. Right-click on the .exe file, go to "properties", then tab "Compatibility" and change the following settings:
* Tick box "Run this program in compatibility mode for", and choose "Windows XP (Service Pack 2 or 3)"
* Tick box "Disable visual themes"
* Tick box "Disable desktop composition"
* Tick box "Disable display scaling on high DPI settings"
Then, click "OK", and start the .exe file. Now, everything should run smoothly...
Check out the pic below