Instructions
Insert your "San Andreas" game disc into your PC. When the "San Andreas" window automatically loads, select the "Install" option.
Click "Next." Read through the Rockstar Games terms of use (these are legal terms you agree to by installing the game). Check "I Agree" and click "Next."
Select "Minimal" from the list of install options. You can choose between "Full" and "Minimal." Performing a "Full" install places every file required to play the game on your hard drive. This requires 4.7 GB of hard drive space. A "Minimal" install requires only 3.6 GB of hard drive space.
Select "Next." Continue to click "Next" until the "Finish" option appears. Click "Finish" to install "Grand Theft Auto: San Andreas" onto your hard drive.