OK so I made the move from 'Classic' 6.5.x (IIRC) to Threads 7.5.x and used the importer and, thanks to some technical wizardry from UBB Central and AllenAyers I am up and live.
The legacy files/folders on my server - stay or go? For example the UBB Folder, all of the nonCGI, CGI items, etc.
Thanks!