Did you buy the game or do you use NO-CD Crack?
As for FPS, here's my commandline.txt:
-DX9 /low †
Download Contig.exe and make a shortcut in your desktop. Put the real contig file in your GTA 4 Directory. Afterwards, open properties of the shortcut file and add this like this - .....exe" -s
Then, run it.
These are some few ways to increase fps. Read the sentence given in the manual - "Increased performance will be noticed on more powerful system." If you have good PC then it will run fine with no missing textures and no fps kill.
Patch 22.214.171.124 is the latest one. If you have any problems, that patch should fix it.
Contig.exe - Google it.
Patch 126.96.36.199 - You can find it in Rockstar Support site. (The site also includes the older patches. It might be useful if this Version is giving you trouble/crashes/errors.)
Keep your seettings are the lowest or just test it via Benchmark tool. This post has been edited by Dr. John13 on Thursday, Apr 5 2012, 10:35