I've noticed that alot of people are confused with checking if Undiluted Platinum will work for there psp or not, so here's how to check.
1. Turn your psp around so your facing the UMD drive
2. Open the UMD drive
3. Take a look at the top right corner inside the psp
If you see IC1003 then your psp IS NOT Undilutued Platinum compatible
If you see IC6001 then your psp IS Undiluted Platinum compatible
If you see NOTHING then your psp IS Undiluted Platinum compatible
If you are still confused read this