This is nothing more than a simple installer to apply the SONY 5.01 Firmware fixes to 5.00 m33.  (There have been safety checks put in place, to prevent someone flashing this to the wrong firmware...) Some people don't like manually flashing their PSP, so maybe they will find this helpful.

A video demonstration of the Easy Installer:
http://www.youtube.com/watch?v=SfBJ4vxCBgw


Please see:
http://dark-alex.org/

for more info on 5.00 m33


Credits to matchung for investigating what files changed between 5.00 and 5.01 and testing it.