I know there are loads of threads about unbricking a PSP but they all tend to say different things. This is whats happened to my PSP:
It was on official 3.02 I then used the new Noobz downgrader using GTA:LCS (old version) and then had a 1.5. I then upgraded that to 3.03OA-A which worked fine but I could not run any homebrew at all. I decided to then re-downgrade to 1.5 and this is when it bricked. I have access to the Recovery menu and USB works fine, and I have tried using the 3.03 eoupgrader on another PSP to get the DATA.DXAR file and put these in the psp\game\recovery folder but when I run this it just recreated the DATA.DXAR file and I still have a bricked PSP.
Could somebody tell me what files I need and where to put them, or even better if they could PM with the files that would be great. I just dont want to have to get $ony to fix it.
Hope somebody can help, cheers!
Doubleposted Message Below:
Would this work?
Use the AutoDownGrade generator to create the OEupdmaker folder and put this onto my PSP into the recovery folder and run the EBOOT to create the DATA.DXAR file.
Now that the DATA.DXAR file is in the recovery folder use the 310oeflasher EBOOT file and run that from the recovery folder!
What do you think?

__________________
Black PSP f/w 3.10OE-A -> 3.03OE-C
Black PSP f/w Un_Bricked and now on 3.03OE-C
1GB MS & 2GB Sandisk
Best homebrew apps are irShell
Best homebrew games Zoo Keeper, PSPectrum & BioHazard 2
I'm Currently Playing - Gran Tourismo 2 & Klonoa 1
Currently Listening to - Fudge Tunnel, Conflict, The Beat, Sub-Hum-Ans, Wolfmother & Janitor Joe
Wife Playing - Zoo Keeper!!!
Wife Listening to - The Killers, The Killers, The Killers and more Killers