found this in anouther forum, btw im using 2.71 SE and i got no idea how to make this work, the other forum is filled with zombie that only say thanx and ddont bother helping:
have found a file that allows you to go reconfigure device hook from within the emulated xmb. WITH THIS FILE YOU CAN SWITCH BETWEEN ISO/CSO AND UMD. I have tested this and can confirm this works great.
It was written to work with DH46 emulating 2.71. this is what I have tested it with. It is basically a homebrew app that alows you to go bbck into some of the DH settings
MEGAUPLOAD - One-Click Webhosting
BTW I DID NOT CODE THIS. All respect goes to original coder