There's a wonderful free Microsoft tool called Logparser...
http://www.microsoft.com/downloads/details.aspx?FamilyID=890cd06b-abf8-4c25-91b2-f8d975cf8c07&displaylang=en
Once you figure out how to use it you'll find it tremendously powerful and fast too.
I used to use it a lot, but not in my current role and no longer have access to my old servers, otherwise I'd send you some sample queries. It's ace at querying event log files, active directory, SQL logs and lots of other stuff too.