I've got two PSP's with version 4.5 fireware on them and I wanted to put one of the custom M33 software/fireware onto it. Reason being, I want to be able to get to the "boot menu" only available on the custom fireware, this is to enable me to install a cheat device for grand theaf auto game.
What I'd like to know is, do I need to update the PSP's offical fireware first and then load the M33 fireware over the top of it, to patch some how or do I just download the M33 and it's all there to update the fireware etc?
Thanks in advance!