Jimmy,
It's not possible to automatically transfer Regsitration setting to the Music Finder database.
As a custom Music Finder Database user myself, I don't recommend attempting to create/edit more than just a few MFD song records (at a time) on the PSR3000 keyboard itself. It's far too labor intensive.
The two available search options in MFD allow you to search a number of criteria from genre, tempo, style, and alphabetical both ascending & descending. In addition, you can create & define your own custom keywords in the 'keyword' field & use these as searchable criteria. I've also outlined several things which will further expand the power of the Music Finder:
http://www.synthzone.com/ubbs/Forum37/HTML/009118.html I HIGHLY recommend that you download & install (on your Windows PC) the terrific 'Music Finder View' MFD database creator/editor utility software by Michael Bedesem:
http://www.svpworld.com/util_mfdview.htm "Music Finder View" makes creating your own custom PSR3000 MFD database (or editing an existing MFD file) both fun and easy.
I suggest copying the existing MFD base in your PSR3000 to the smart media card, and copying it to your PC HD. Then load into the "Music Finder View" program and edit & add records there. Once edited, bring the file back into the smart media card and load it into your PSR3000 MusicFinder. Don't worry about losing the original Music Finder database as it's in your keyboard ROM memory, if you should ever want to load it back in . . . I certainly don't.
On behalf of the Yamaha PSR keyboard community, many thanks to Mr Bedesem's for his continued support providing his excellent Yamaha keyboard utilities, and for FREE to boot:
http://www.svpworld.com/psr_software.htm#stylemanager I find Music Finder View extremely useful and don't know what I would do without it, as I rely on it on regular weekly basis.
Jimmy, just in case you missed this, here's yet another link to a thread which I cover on this topic:
http://www.synthzone.com/ubbs/Forum37/HTML/009131.html Good luck.
Scott