Suitcase Fusion 3 is an OSX Leopard (10.5) and OSX Snow Leopard (10.6) only product. CS2 is not supported on either of these operating systems by Adobe and so there are no plans to support plug-ins for that version of Adobe Creative Suite with this new version of Suitcase.
If you therefore need support for Adobe CS2, you should continue to use the earlier versions of Suitcase that had automatic activation plug-ins for CS2, but with the caveat that you should not really be running CS2 on any OS later than OSX 10.4 Tiger as it is not tested/supported on later versions of OSX.
If you don't have an older license for Suitcase that has CS2 plug-ins and are looking to purchase a new application you should contact the Customer Service
team to go over your options.