ps3 cfw queries
I have two questions
1. Do i need to jailbreak my ps3 before installing kmeaw cfw 3.55?
2. Is there any cfw version 3.56?
No to both of your questions.
1.) if you have 3.41 or lower just update with kmeaw cfw 3.55 to update to the latest JB
2.) No there isn't any CFW 3.56 at this time
Hope that helps.
There is no CFW 3.56 because 3.56 is only a PSN security update, so you do not need it to run your backups.
Side Note:- Please read around the forums before asking.