Hey there, thanks for the help! I did manage to do it okay tonight. I was able to transfer one game in its entirety from PSP to my PSVita by hooking it up to my PS3 and using the Passport application. Ended up paying 1,000yen extra to download the content to my PS3 again, though. But I guess that's better than paying 5,600 twice for the same game.
...but I think I missed backing up one of my favorite games (
Sol Trigger) before I restored the factory defaults on my PSVita (apparently, I was dumb and used a different PSN account to register it...and needed to wipe it to be able to use my original account with it... which also dashed any hope of being able to DL this game again for free). Woops. Oh well, at least I managed to save all my game saves, so I'm not devastated. I just can't get the game again for a while... heh