I have a 1.5 PSP I bought off a friend of mine. Now I'm completely new to the custom firmware scene, so I'm going to sound like a complete moron for asking this. I also lack a spare battery and memory stick to run Pandora in the case of something happening. I've searched for a comprehensive guide on how to pull this off but found nothing. Is there any chance of someone guiding me through upgrading a fat PSP from vanilla 1.5 to the latest stable firmware? Sorry in advance if this topic has been done to death. Thanks in advance.