just completed parsing an IIS log into SQL Server with a tool I found yesterday. LogParser 2.2, which can be downloaded from MS downloads. check with the MS IIS site http://www.iis.net/default.aspx?tabid=1 you can parse a wide variety of log files from system logs like the event log to SQL Server logs to IIS logs. You have to do a little work from the command line, but I like the tool. I generally prefer a nice user friendly gui but this gets the job done when you understand the params.
also, about a month or so ago i downloaded an XML editor i remember from several years ago that several developers i knew really liked. its much improved and i highly recommend it - XML Notepad. Its a VS 2007 tool. give it a whirl. It made understanding the XML data in my GPS much easier. web configs are much clearer especially changes are made in a hurry. it can also "beautify" the xml code making life a little easier!