Is it possible? I've tried various ways of installing 3.71 on my memory stick and loading it up with Time Machine. I've dumped my NAND after I downgraded to 3.71, tried updating a 360M33 install using the 3.71 m33 update, and I've tried using different IPLs.
It seems that even when I load 1.5+3.40 or 3.60 M33's IPL in my 3.71 M33 folder it just loads up the firmware I borrowed it from (1.5's ipl.bin will load 1.5 even when in the 371M33 folder, etc.)
So is it possible?
My reason for wanting to do this is simple. I want to play Metal Gear Solid and the only firmware that works 100% with it is 3.71 M33. Lower firmwares require you to fiddle around with your save to change discs, and higher firmwares require POPSloader which desyncs audio in MGS (even when using the 3.71 pops files)
Thanks in advance.