Hi everyone. Im new to the PSP world and just bought a PSP slim. it already had CFW (ver 3.71 m33) installed on it when i bought it. I had a question regarding an upgrade to either 3.80 m33 or 3.90 m33. "Since i already have cfw will i be needing a pandora's battery for the upgrade to 3.80m33 or can i directly do it? Please answer in detail as im a newbee. thanks.