You can try steps provided in KB to collect IIS logs using agent. Here's a link.
For configuration on IIS side, please follow produces provided in a topic "9.5.30 IIS WebServer" on page 1156-1157 of "9.1.3McAfeeESMIUserGuide" file.
Let us know if any problem found.
I just went through this exercise yesterday and got it to work after a few hours. Let me know if you run into issues.