This is the update version, which you have to isntall CFW 5.50 GEN-B first.

Requiremnets:

• PSP Fat (PSP1000) and PSP2000 ONLY!
• Your PSP must installed CFW5.50 GEN-B
• Battery at least 78%
• No need Pandora for update

How to install Custom Firmware 5.50 GEN-B2

Do exactly the same thing as you install GEN-B (Custom Firmware GEN-B Installation Guide), but put it in different folder.

Download [download id="68" format="1"]