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To create a commandline to change the resolution, create a new notepad file. Type in '-width (whatever your monitor's width is, in pixels) -height (your monitor's height)'. For example, my monitor is 20" and the resolution is 1600x1200, so I would type '-width 1600 -height 1200'. Save it as 'commandline.txt', then place it in the folder that GTA IV is installed in (default C:\program files\rockstar games\Grand Theft Auto IV). Don't expect it to run great if you only have a 256mb graphics card, though. Alternatively, you could just type in -nomemrestrict (or whatever it is, it's explained in one of the sticky topics) and change the settings for yourself in the game. Have fun. Well I have a Q8400 2.66 GHz overclocked to 3.6 Ghz and OCZ Reaper Memory Overclocked to 5-5-5-10 at 1048 MHz, with a HD 4830 overclocked to 650 MHz GPU and ram at 1000 MHz. And I can play this game full blown with 1600x1200 everything either high, very high, or highest lol. View Distance 100, Detail Distance 100, Vehicle Density 100, and Shadow Density 16. With no lag and almost no texture problems. But hell when you build a system that can compare to the new I7 stuff ! But hey this guide really helped.