Very bad problem due to my stupidity

Well i downgraded my psp back to 1.50 today and upgrade it up to 3.03 OE-A and thought this is going good but then i was stupid and didn't read the next bit where i then installed 3.02 OE-B over it so no that small fix won't let me run any apps or games can anyone think of anything?

Im so stupid please help:(

Use recovery mode to get to 1.5 again. Then updated it.

never really used OE how do i access recovery mode?

Hold down the R shoulder button when you turn on your PSP. The recovery menu should appear.

thanks guys you've been a big help

No problem. :)