The”MPH Firmware launcher”allows to launch a firmware from the PSP’s memory stick. The firmware must be in file format and not in eboot.pbp format, for convert a firmware eboot.pbp in file, use the psardump02a tool. Use the tool at own risk! Changes:

Beta version with another core

Load 1.00, 1.50, 1.51, 1.52, 2.00, 2.01, 2.50 firmware

http://mphwebsite.tuxfamily.org/index.php?page=0