White PSP 3.01 downgradable????

A friend of mine has just given me his new psp to downgrade to the oe firmware. I have done a couple beofre but they were all 2.6 psps. this one is a white 3.01 psp. I cant see any markings on it to say if its a ta082 psp so i think it should be ok to downgrade.

Could someone please tell me if this is possible to goet to 1.5 and then 3.03oe and if so what downdater do i need? ...and how to tell if i can do it?

So many quetsions! lol

Thank you.

Have a read of the attached it will tell you all you need to know plus the 3.03 downgrader checks the psp falls into the criteria needed to downgrade so if it does'nt it wont do it and ta082 psp are patched automatically by this downgrader. AS ALWAYS THERE A RISK OF BRICKING WHEN DOWNGRADING USE AT YOUR OWN RISK