There seams to be a new WORKING program to let UMD's boot!
this is quoted from http://www.psp-scene.org/
for more info and download: http://www.psp-scene.org/modules.php...ic&p=2211#2211Today we have to thank Vampire who has created UMD RUN v1.0 for the PSP!
To use UMD RUN v1.0 with your PSP v1.50 firmware, simply install it using KXploit v1.50 and then (with a PSP UMD Game Disc inserted) press X at the PSP Menu screen to load the Game's BOOT.BIN via UMD on your PSP console.
Before people ask, this current version will NOT run UMD Dumps from a Memory Stick, however, RUMORS are telling us that we need to set the kernel mode flag in module info and run sceKernelLoadExec from a thread with flags 0x0000 (0x8000 doesn't work) to let these executables boot from Memory Stick.
meanwhile enjoy this little neat program!