I recently bought a PSP 3000 with 6.20 OFW on it, I plan on playing psp games, some homebrew and emulators on it. Does upgrading to 6.60 OFW so I can run 6.60 CFW and go without the permanent CFW offer any advantages (or is CFW like it is on the 3DS running it in "emunand" and running a later CFW than the OFW on the handheld)? If I go with permanent 6.20 CFW for now is it easy enough to upgrade to 6.60 CFW?