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.

Download: DOWNGRADE371M33:
[Only Registered users can see links . Click Here To Register...]

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does this work with psp slim

what website i can find Original FW 1.50.

Works??? Please Tell Me

Please tell me if it's good!!
i have a sony psp version 3.72 and i want to dawngrade it to 1.50 and i don't know if this file is good so PLEASE TELL ME!!

HEY pajets I FIND THE FW 1.5 BUT I FORGOT WHAT SITE WAS THAT

SORRY VERY SORRY!!!!