If you recently bought a PSP and having hard time running some Latest games first thing you should check your PSP firmware version because sometimes stock PSP on store might be old specially those stores that are not that popular. Then you might want also to consult those friends of yours who have PSP for advise. There is also a tool that you can use but please don’t use it if you don’t know how to do it.
For Firmware 5.50 gen d3
* Compatibility with all known PSN Game/Démo from on 15/12/2009
* Compatibility with all known UMD on 15/12/2009
* Add ISO SPeed MS loading
* Network update
For the knowledgeable ones you can download 5.50gen d3
Team GEN’s custom firmware 5.50 GEN-D3 for the PSP.