News/release from Samhain;694755:
This is how I've downgraded my FAT PSP with CF 3.71M33 to 1.50 Original FW: * 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. I got a FAT PSP with motherboard prior to TA082. I've no responsibility if you damage your PSP with the above procedure. Works on TA-079 and TA-082 Description Source: PSP News