wow, Italy to Texas. From the birthplace of of the Renaissance to red neck hell
Relax, we will get you going. YES, you need to unlock those recall memory's. Utility menu, source set-up, current channel locked / unlocked = toggle it by pushing the enter key.
You should also be using channels. I have a simple guide that walks you through basic set-up if you like. E-mail me through my signature link and I can send it.
the marquee has something like 80 channels available you can pre-program. Realistically though a used Lumagen HD for $150. would accept all your sources and output one resolution = 1 channel on the PJ.
Since you have a moome card now, you might even be able to get a modern AVR receiver to do this as well.
I remember I sold 1 or 2 8500's to Italy "back in the day", wonder if it's one of mine?