I downgraded my 6.35 to 6.20 on a PSP 2001 (hackable). Then I installed, due to ignorance I suppose (I haven't hacked my PSP since I imported a 1.0 from Japan in 2005) 6.38 ME. I can put UMD ISOs in the root://ISO folder and they show up and want to launch, but they all fail to keep running with the generic 80010087 error.

I don't think I can downgrade from 6.38 ME, so perhaps I'll just have to wait until the tools catch up and support 6.38 ME. But then again, I'm a n00b. Any suggestions would be appreciated.

Thanks!