I've posted a new 3.1 release on the downloads page. This release contains a roll-up of the fixes to v3.0, fixes for some display issues, incorporates the team logos add-on (it's now a configuration option) and adds support to easier customization.
The included readMe.html contains instructions for upgrading an existing v3.0 pool. In short, you keep your current versions of the data/NFL.mdb, includes/config.asp and includes.email.asp files and replace everything else. You'll need to edit your current includes/config.asp file to add the team logo setting but that's about it.
If you've modified any of the code, you'll have a little more work to do, but it should be easier to add custom styles and javascript code (see the read me file for details).