Jailbroken iPhone 4S on iOS 5.1.1 and want iOS 6

I have an iPhone 4s currently running iOS 5.1.1 and it is jailbroken with absinthe. I want to get rid of the jailbreak and get the new firmware iOS 6 but I'm having problems. I've been told to restore my iPhone in DFU mode with iTunes. It downloads a good bit of the update but then stops giving an error message. Is anyone else having this problem and is there a solution? Any help I'd appreciate it.

Added (1). Also, is it possible to get iOS 6 without unjailbreaking? I'd be cool with that also.

Just do a normal update with iTunes & it will update and rid of your jailbreak.

No possible way to update to ios 6, still Jailbroken.