View the code for this demo.
This simple tool strips out the extraneous comment headers that are inserted by IIS6 as the worker processes start after a timeout. This is typically only a problem for lower volume sites. Cut'n'paste your log files into the area below and hit the button. You will get back a text file with the cleaned log file in it.
Note: This tool is "dumb" in that it assumes that the fields in the report haven't changed for duration of the log. The first 4 lines are assumed to be the gospel and any other comment lines are removed.