Like the title says. Download this torrent, and go here for all cracks and patches.

To mount the ISO's, go get a copy of Daemon Tools, and mount the first disk. When the installer prompts you, create a virtual disk drive for the second ISO, mount it, and continue installing.

Replace the LaunchGTA.exe with the cracked one to allow you to run it without a disk. Run the patches in order, starting with the lowest number.

This game is somewhat demanding, so you may not be able to run it. Go here for a few ways to make it run better.