Then after a few minutes (you might just see a black screen again) the upgrade will be completed, and you will have to press the X key again to shutdown your PSP.
Now you have the 3.52 firmware, but you still have to apply the M33-4 patch.
The archive avaliable on this website includes the M33 Creator, 1.50 and 3.52 official firmwares, and the M33 Update #4 patch. You can download it from one of the following website: M33-4Mirror: M33-4Extract all the files onto your PSP in the PSP/GAME150 folder.
It has to be the GAME150 folder, otherwise the upgrade file will not start.
So, can someone point me in the direction of what I need to do, a link to a Tutorial perhaps (I searched but couldn't find), Thanks in advance.