I dont want to be rude with you, but...
You still didn't get it? Don't you? Any discussions of any illegal stuff (including but not limited to: torrents and etc), are prohibited here. Don't do this mistake again, please, or someone will report about you here:
http://www.fbi.gov/about-us/investigate/cyber and we will be having your face looking at us in
Cyber's Most Wanted section.
As for the error, please remember: if you got CRC error, this mean that your GTA3 data files is not original, but still, you can play with such game on any server with anticheat turned off.