Okay, tried that and it worked. Thanks.
By the way, if I want to uninstall the mod, do I have to uninstall/re-install whole GTA IV or is there easier way?
When I run the setup program, in "System Compatibility" section, it says I don't have .NET Framework 4: Full Profile (there's a red exclamation mark next to it).
I don't know what the problem is, because I'm pretty sure I have the latest .NET framework installed. There's no new Windows Updates or anything. Any suggestions?