I've been trying to upgrade the firmware of my PSP throughout the entire day, and at the end, I'm afraid I apparently fucked it up...

You see, I installed the latest Custom Firmware 6.38, but apparently I made the mistake of installing the version for PSP 2000 and 3000 in my PSP 1000, and now I can play none of the games I had on my Memory Stick, and not even access the Recovery Menu for some reason.

Can someone please lend me a hand in this situation? If I can somehow downgrade to 6.35 Pro-B3 for 1000, I'd be really, really grateful.