For lag removal (this helped me alot, i was looking for this for a long time) put these files in your GTA sa directory (the files in the folder ''lag removal''), if it asks to replace gta_sa.exe do it, because this is the 'American' version of gta_sa.exe and it works only with that version.
This is actually a stream memory fix, it removes all the 'slow buildings loading' or 'no buildings loading at all' problems.
Its mostly used for running HD/HQ mods that will cause lag in your game. Well not anymore ;P enjoy.

PS: this stream memory fix is not mine lol, only the car xD

By Chriss442