This will allow you to run 5.55 and 6.00 games. If it requires GEN-B you can get it HERE. Any other CFW requirements can be found below.
5.50 GEN-C Installation:
1.) Download the 5.50 GEN-C file below.
2.) Open your PSP up in USB mode.
3.) Go inside the MS_ROOT folder of the 5.50 GEN-C file your just downloaded and drag all the contents of it to your Memory Stick's Root.
4.) Run the installer.
5.) Click Install 5.50 GEN-C.
http://www.megaupload.com/?d=O0C19I1D
5.50 GEN-D Installation:
1.) Download the 5.50 GEN-D file below.
2.) Open your PSP up in USB mode.
3.) Go inside the MS_ROOT folder of the 5.50 GEN-D file your just downloaded and drag all the contents of it to your Memory Stick's Root.
4.) Run the installer.
5.) Click Install 5.50 GEN-D.
http://www.megaupload.com/?d=M471N7VD
5.50 GEN-D2 Installation:
1.) Download the 5.50 GEN-D2 file in the attachments.
2.) Open your PSP up in USB mode.
3.) Go inside the MS_ROOT folder of the 5.50 GEN-D2 file your just downloaded and drag all the contents of it to your Memory Stick's Root.
4.) Run the installer.
5.) Click Install 5.50 GEN-D2.
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