Since many people seem to be unable to read the readme in Cintro Mod V 1.0.2 I thought I would post this as news to hopefully reduce the number of bricks occuring.
If you use V 1.0.2 on FW 3.03OE you will brick your PSP! You won't be able to go into the recovery menu.
Reason:
"The 3.02OE-B vshmain.prx in module is different from 3.03OE-A's so the program hex edits values that arent ment to be edited as they are in different places.
aka. brick."
To counter this a new version for 3.02OE - B & 3.03OE- A & 3.03 OE - A2 has been released.
This version should be safe but remember flashing your PSP always has a risk.