I have a certain ISO I want to run and for some reason when I use DevHook .51 and boot to any firmware my PSP freezes. It will show the new firmware for a split second then the PSP will freeze. DevHook .41 works great however, I'm not sure what the problem is... I am using firmware 1.5 by the way... I've also tried watching a video tut and using like 3 programs to get eboots 2.71 and 2.8 installed into the DevHook folder but still, no go.
Any help?