Given that 4.3 is due to be released next week this may be a moot point, but I was curious about whether it is possible to jailbreak using greenpois0n without changing the boot logo or doing anything other than just JB the phone? I don't know if it themes anything, but really all I want is the jailbreak and Cydia...I can go from there.
3GS 4.2.1
3GS 4.2.1