I download all of my extra fonts into their own folder that way I don't bog down
PS and I can move them or save them to my external HD for save keeping.
I need to check out the Adobe Font Manager, but if that one doesn't trip your trigger if you've not yet heard about "The Font Thing", it is a great free program. It will show you installed fonts and then those you have in your other folders(collections). When I mean shows you the installed fonts, I mean it has a window that shows your folders, another that shows the font name and file name and then a big window that shows a sample of how a phrase would look using selected or all of the fonts. It's a great little tool!
As far as scaning 8mm film....have not done that...my scanner takes negatives, but haven't attempted 8mm. Don't think I have any film laying around anymore either to give it a try. Had moved all of that to VHS tape and then the tape to DVD's....good luck.