I dont have steam games installed/downloaded at the moment to check this but from what i remember dont you just install the 1.0.4.0 patch then run the game from the LaunchGTAIV/LaunchEFLC.exe in the main dir with steam closed.
if not saw this earlier
http://www.gtaforums.com/index.php?showtopic=474462
heres what it says in the readme about frying cards:
!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!
!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!
This version uses the 0.082 DLL as a base
Which means :
Overheating of videocards NVidia GF8800, high end from GF2xx series and most from GF4xx, GF5xx
Be careful.
No one is responsible if you have any hardware problems.
Just try to avoid overheating using a better fan.
If you results some artefacts , bugs , everything going all blue , and massive slowdown for
no reasons.
Stop playing.
!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!
!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!
My temps didnt seem any different after 30mins on it. I quite like the mod too, compared to the others anyway. They never look right all the time but this one does pretty well and with some nice new lighting. It definately needs the 1040 patch too. Does anyone know how to use the trainers on the old patches?
These screens are with no other visual mods as you walk out the door at the start of the game. These things always look better in the screenshots tho