I used this Psar Dumper from M33:
http://www.psp-hacks.com/2007/09/14/...mper-released/
Then i Downloaded This Official 3.71 Upgrade:
http://www.psp-hacks.com/file/1259
I Unzipped the Psar dumper and tossed in the folder newpsardumper in my GAME352 folder on my Fat PSP running Firmware 3.52 m33-4 and the Official 3.71 Firmware i put in my Memstick Root folder, then i ran the Psardumper and selected ( Dump All - SQUARE )
After a while i had a new folder on my Memorystick called F0
In the F0 folder i stepped in to the folder kd
Then i selected usbacc.prx + usbgps.prx and copied them to my MapThis folder
Attatched the PSP-290 on my SLIM running 3.71 M33 and launched MapThis v0.5 and it worked fine.
The files are Encrypted so just following my guides and enabling USB for Flas0 does not really work because you only get Encrypted files wich has to be "Decrypted" *See it as a Locked and Unlocked file!*
Attatched my Dumped and Decrypted 3.71 .prx files to this reply*Enjoy*
Edit:
Ive uploaded a Video on YouTube of my Slim running MapThis v0.5 and 3.71 M33 with the .PRX files from the official 3.71 Fw.
http://www.youtube.com/v/IHGvKs055N4
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