I have just returned to the land of PSP, and it would seem that one would need a map to navigate this once simple place. @.@

I have 2 PSPs here that haven't been updated in a long time and have found the guides on how to do the updates, however I am not sure what update I should be using. The PSPs are a 1000 and a 2000.

I see that my choices are between CFW 6.39 ME v9.5, CFW 6.60 ME v1.4, and 6.60 PRO.

From what I can tell, the ME version is the same as PRO, but it just receives more frequent small updates. However I don't know the difference between 6.39 and 6.60 and why I have found so many downgrading guides from 6.60 to 6.39. I looked all over and people just say to use this one, or use that one, because its better, but no one ever says why either of them are better.

A little guidance with this would be greatly appreciated.