YOU CAN DOWNLOAD GTA 4 ON THE FOLLOWING SITE. IT IS BETTER IF YOU HAVE A DOWNLOAD MANAGER...
ftp://77.108.98.148/Games/GTA IV PC Version/GTA IV DVD 1.iso
ftp://77.108.98.148/Games/GTA IV PC Version/GTA IV DVD 2.iso
ENJOY...
BUT IT TAKES LIKE 15 TO 16 HOURS FOR DOWNLOADING AND YOU ALSO NEED A VIRTUAL DRIVE LIKE POWER ISO FOR THE GAME TO RUN...
I WILL SOON MAKE A VIDEO IN YOUTUBE TO SHOW U HOW TO RUN THE .ISO FORMAT GAME
i just hope it works................