Hi All, i made new topic to improve GTA IV performance, because last topic made by Rami, isnt updating some by him.
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HELPFUL, Powerful, Useful  TIPS To improve GTA IV Performance.
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So, 
How to improve GTA IV Performance?If you're tired of lagging, getting your game frozen each few seconds, and getting white-black textures while playing, you might want to follow the tips.
Useful tips to improve
your GTA IV performance:
SPIKE Lags.If you're tired of spike lags, follow tip.
1. Open 
msconfig.
 It will be in start >>> Search files, WRITE>>> msconfig.2. If you have open msconfig, go to Services ( Bookmark )  and unmark:
-Windows Event LOG
-Windows Event Collector.3. 
Apply it, and IF computer 
want to restart, restart computer, If not want , you should restart to apply it.
3. After it game should work, fine ( it working at me ).
Next Thing is Visual effects. It improving your game 
2FPS-3FPS more, You must have 
Definition OFF in options.
Download Link.:
Put it in :
Main Folder GTA IV >>> Common >>>> Data.
Remember! : Definition must be OFF in Graphics Options. IT improving ur game 
2-3 FPS more ( Average ).
Next Thing is Contig.
Contig  is program to  a single-file defragmenter that attempts to make files contiguous on disk. Its perfect for quickly optimizing files that are continuously becoming fragmented...
Download Link : 
http://technet.microsoft.com/pl-pl/sysinternals/bb897428.aspxInstruction:
1. After Download, Put Contig in Main Folder GTA IV with Files.
2. Make Shortcut from it and put on Desktop.
3. Right Click on Shortcut Contig and choose >>> Properties.
4. Add on end Target:  -s    with SPACE.  Apply it.
5. Run Contig (Shortcut !!! )  as 
Administrator6. 
It taking 20-30minutes or less.7. 
Have fun with more FPS. 
Timecycs: If you want by your game will be realistic, and with SOME more FPS 
(1FPS-2FPS) Download it:
Farclip:This mod increases the draw distance to the maximum, yet your draw distance in settings can be at 1 !!,
 IT saving precious VRAM. The idea is clipping.
FarClip 3500 - Longest View Distance before you can see the farthest reaches of the map (which show up a solid white).
FarClip 3000 - Medium Yet Still Double The GTA IV Default Distance
FarClip 2500 - Shorter Draw Distance
Better is Farclip 3500, for me.
Download Link:
Next Thing is Commandline.I have commandline made to my PC Specs, 
If someone want i can make for him.. I sharing this commandline.
Download Link:
Its for 128MB VRAM Card graphics and less.
This is all USEFUL and HELPFUL tips to improving FPS 
I have 64 MB VRAM card graphics, and running it without lags with this things 

Greeetings 
