Ok.. so i take it you have already downgraded your PSP to 1.5? If you have, it looks like your well on your way to upgrading to 3.03 OE-C. Do you have the 1.50 and 3.03 updaters with the names 150.PBP and 303.PBP in the game folder? If not:
Download the 1.50 Upgrade Eboot, name it "150.PBP", and put it in the oeupdmaker folder.
Download the 3.03 Upgrade Eboot, name it "303.PBP", and put it in the oeupdmaker folder.
On your PSP, run the 3.03 OE-C Update Maker program. This program will create a file called DATA.DXAR in the oeupdmaker folder
Copy the directories 303oeflasher and 303oeflasher% to /PSP/GAME if you are using 1.50, or to /PSP/GAME150 if you are using 3.0X OE
Move the generated DATA.DXAR from oeupdmaker to 303oeflasher directory
Make sure your battery is atleast 80% and plugged in, and you reformat your mem stick first.
IF your already past this step, then im sorry for blabbing, i just didnt want you to mess it up :), to execute the updatemaker, you have to go on ur psp, scroll over to games, down to mem stick, and then run the file "3.03 OE-C Update".
Originally a TA-082 2.71->2.8->1.50->3.10OE-A(didnt like it)->1.50->3.03OE-C->1.50->3.52M33->3.90M33->5.00M33->Bricked->1.50
->3.52M33->3.71M33-4->4.01M33->5.00M33-6