For general background try this:
Securing an installation of IIS 4/5. (No, seriously)

For more detail on IIS logging try this:
Building your own IDS tripwire.

These might also be useful for reference:
HTTP/FTP ServiceStatus codes
Web based IIS administration (ADSI)
Backing up the IIS metabase.

Hope that helps. If you need anything more you'll need to be a bit more specific about services config etc. Feel free to mail me if you are still having problems.