Congrats on the tweecer purchase!
The GUFB does not tell you how to tune for your application, but it does define the terms, and how values are calculated.
It should also be noted that the GUFB only applies to the A9*/X3Z series computers.
Once you have joined the Yahoo tweecer forum, you can find the GUFB in either text format or pdf format at this location.
http://autos.groups.yahoo.com/group/...Documentation/
jason