Need Help with 3.03 oe-c

I am considering getting rid of my custom firmware which is 3.03 0E-C So that way I can trade my psp in for credit on a PS3. I need to install the sony update but cannot since I have the custom firmware. Can some on point me in the right direction on where to start with the downgrade/upgrade process.... Thanks!!

[ace]

http://www.psp-haxors.com/forums/showthread.php?tid=786
http://www.badongo.com/file/4659816

Either link should have the necessary files. Just stick them in the GAME folder in PSP so that all the files are in a folder called RECOVERY. I didn't try either but got the link from 2 different people. Just go to the recovery menu and run the file located at where you put the recovery folder. It'll be an option on the first screen of the recovery menu. That'll make your psp go back to 1.50. Then just trade it in. Maybe someone that knows what there doing will end up buying your psp and won't have to downgrade

wow the 1.50 installer worked perfectly......Thanks alot

Just a question...but why would you trade in your psp for a ps3?
You know you can do alot of stuff on a ps3 using your psp right?

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Last time I checked you get $90 from trading it in at gamestop. Just ask newpspdude what he got for his. You could probably make like an extra $40 selling it on ebay with custom firmware on it.