3.93

Hi! A friend of mine recently gave his PSP (with a system software of Version 3.93) to me because he no longer uses it so I would like to upgrade it to 5.50 Gen-D. Question is...how do I that? I'm a total newbie at this so a proper guide or links to videos would really help.

Anyone can help me hack a PSP 3.93 to 5.50 Gen-D without the use of a Pandora? The PSP Model is PSP-2004 with a Date Code of 7C Can this be done?