My post about this was locked at psphacks before anyone with a 1.5x psp could even test it!!!! :mad: :mad:
i did this on a 1.52 us psp i am not saying it will downgrade i am just saying it starts the 1.5 upgrade on a 1.51/1.52 psp (i cancled at 1% afraid it might brick my psp)
1. put the 1.5 jap update on a memorystick in PSP/GAME/UPDATE
2. put a different memorystick in the psp and go to network update and download the new firmware to the memory stick
3. when teh psp says click x to update now swap the memorystick for the one with the 1.5 update on it
4. click x and it will start the update!!!
for all 1.5/1.0 users who don't beleive that it downloads to ms go to network update and after it has searched for an update it will say QUOTE:network update has found a later version. to download, insert a memory stick with al least 16mb free space and press the x button