YOU WANT FIX YOUR LAGG!!! , Take This!!

[HatZ]

You even took the time to try it out? D;

LOL! , mAzz he isn't make ur FPS or Something he depending on your system specs this may or may not help you, if you have integrated graphics then it'll help.
"This handy util reduces the size of gta3.img and gta_int.img by over 50%, which may help reduce the lag-stutter type effect on some maps. "

Thanks,