Hi Jeff,
Unfortunatly there really is no good way to upgrade from v2.0 to 3.2. For version 3.0, virtually every template was changed when I revamped the style for the script. Many of the templates were also changed to add quite a few new options as well. It would have been way too hard to try and make an upgrade script from v2.0 - v3.x because of the number of changes, so the best way to upgrade would be to uninstall (using the uninstall included with the 2.0 version) and then re-install the script. Since you have a backup of your templates you could try to re-do any customizations you have done, but be careful to pay attention to what variables have been added/changed in the script. If I could actually remember what variables and such may have been changed then I would try to give you some more details, but it's probably been a year now since v2.0 was released and my memory's really not that good.