Thanks very much DJCOPEY! I got the recovery screen. I discovered that my homebrew folder /PSP/GAME/GAME150 was disabled. I enabled it. Still no good! When I use the XMB to find a game, there are no games to be found! I think that perhaps I deleted something important from /PSP/GAME yesterday while I was horsing around ...

Can you tell me what files should be in /PSP/GAME/... and in /PSP/GAME150/... and in /PSP/GAME330/... and in /PSP/SYSTEM/... just prior to upgrade to 3.03OE-B?

Currently my /PSP looks like this:
/PSP/GAME150
/PSP/GAME150/OEB_UPDATE/EBOOT.PBP
/PSP/GAME303/
/PSP/GAME303/OEB_UPDATE/EBOOT.PBP
/PSP/SYSTEM
/PSP/SYSTEM/BROWSER/
/PSP/SYSTEM/BROWSER/history<x>.dat
That's it!
Should I have a /PSP/GAME/EBOOT.PBP file? Am I missing something obvious?

Regards and Thanks for the Patience, John