I just read this on a message board from sum1 called ben

"#34 | Ben

hi people i cant send this to u now cuz i will get f u c k e d but i can tell u how 2 do it all u need is the 2.0 dwn grader and the fireware unlock.
first u need 2 unlock the fireware but downloading the fireware unlock i will have a step by step 2 tell u how 2 do it(make sure u put the fireware back on your psp after u have downgraded. then used the 2.0 downgrader that will also have a step by step after doing this plug your ac in your psp turn it off and w8 4 the battrey to get 2 100%(when the battery gets 2 100% your psp will start beeping this will take about half hr) when your psp is beeping unplug the ac(power) then turn it on it will have a open screen like dos. on the dos screen right in psp/undata:1.5 then it will say r u shore u wont 2 over right click yes then turn your psp off and take the memory stick outthen turn the psp back on it will say need sorce for card11.83 then put your card back in then it will run . now u will have 1.5 on your psp."

It claims to be a downgrader for version 2.01+, if it is not and is a load of crap I DONT WANT ABUSE!!! i jus thought id post it just incase. sum1 please check it out