why would you want to downgrade 3.3oe-a? it does everything 1.50 does, plus more.
The easiest way to do it would be thru the recovery menu and a 1.50 update eboot.
There are a whole bunch of readme's and guides to using the recovery menu in the OE firmwares, so just search around the forum for them.
I'd just check that you actually do want to downgrade this one. Why not upgrade it to 3.40oe?
Bookmarks