GTA IV (PC) One more bug solved!

Okay my friends, this thread is for those that got GTA IV for pc but as you know, it's full of incompability bugs, well in systems that is good to play other games, it's crap in GTA, it's cause that the damn game don't recognise DDR2 and DDR3 Graphic cards systems, as for example, a 512 Mb card, the game will only recognize 430 Mb or less.
okay here we go:
Open the Note Pad and name it as commandline and on the text box you write this for DDR2 G cards: -availablevidmem 2.0*.
For DDR3 cards: -availablevidmem 3.0*. and save as .txt file on the game's directory ( Rockstar Games\ GTA IV or where ever you put it.
This is an command to force the game recognize the missings megabytes.
Important! Don't name the file with other name, must be this one to get it to work correctly, and on inside the file's textbox, just write what's told to write, nothin' more.