This downgrade procedure by Samhain reportedly works for PlayStation Portable units that have TA-079 and TA-082 motherboards. You'll need an original firmware 1.50 file to make it run. This particular file isn't included in the download below so you'll have to go find one for yourself.
* Copy the entire content of the attached file to PSP\GAME folder.
* Rename Original FW 1.50 file to UPDATE.PBP and copy it to PSP\GAME\UPDATE folder.
* In the Game menu launch "Update to X.Y.Z."
* Follow the onscreen instruction and it's done in a while.
http://www.megaupload.com/?d=43DRM7UA
Pass : indoconsoles
