Guys I have the Answer!
If you are getting the error message, like i did, about some sort of asilog.txt, then the answer is SIMPLE.
1 Go to this link:
2 Download the file from 4shared.com
3
Put the asilog.txt file into your Grand Theft auto IV Directory folder.
The Game should now run perfectly.
Hope this helped, and Enjoy!
Jonosbro.
I used the Above suggested G17 Diagnostics, and apparently i don't have "GTA: IV ASL loader."
Maybe if we installed that then it would work, whatever it is.
hope this helped,
Jonosbro.