Hi McVenco,
Do you have a newer PSP (thiner style with no eject button) or the older style PSP (it's beefier in size and has an eject button to release the UMD drive bay)
What they are refering to for firmware, V1.5x is the most hackable version and you can pretty much run anything you want. If you have a slim line PSP, there is currently no way to back flash it to this code level (it is being worked on tho). V3.xx M33 is a hacked firmware version that allows you play home brew files and god forbid pirated games!!!
Again, if this is a newer PSP you will need what is called Pandora's box (it's a battery with a hack in it), and possibly another PSP with a hacked firmware on it (depending on the firmware level)
I can send you more details off line if you like, PM me with details you need clarification on or procedure on how to back flash.
Also, if you are at the latest firmware release, you may not be able to flash it to a hackable code (not sure been a while since I have been hacking PSP's) but can get that information for you.
