Hey guys and girls, you know that god awful missing, blinking, siezure inducing texture bug that 80% of GTA 4 PC Owners have !
I found a fix for the people with nVidia! ( Sorry for those of you who have ATI)
Okay so uninstall your current grpahics drivers with driver cleaner and download and install these
http://www.nzone.com/object/nzone_gtaiv_downloads.html---------------------------------
Now that has hopefully fixed your problem, there are still some issues with FPS and smoothness right? Well I am here to make that better too!
Navigate to your GTA 4 folder that has GTAIV.exe in it and create a text file named commandline.txt and in this text file you need to put this code in without the quotes "-availablevidmem .9" Now start up the game and checkout your newfound smoothness!