Thank you very much for your help.
Iv'e done research like all day and found out a lot but not all
Please correct me if im wrong:
I need a jailbroken ps3 (only possible with ofw3.55), and as u expected im running on the newest fw.
I found many tutorials that i could use to do it step by step with the e3flasher or im gonna buy a PS3 running on ofw 3.55 on eBay or something like that.
What im not sure about at the moment are to things. First I found many different cfw's and jailbreaks which one should i use?
And the second and most important is how do i modd call of duty accounts through psn than?
I found out it works by tools i use connecting the PS3 to mi Computer, but I couldn't find any tool...
Am I right were do i get the tools and how exactly does it work than??
Again, I appreciate your help and I'm very thankful.