Backup iPhone Image?

I'm wondering if there is a way I can make an image of the current state of my iPhone? This way if something happens, I can just restore it.

I have T-Mobile and everything unlocked so I can use it. Fun was had, I was enjoying it. Then I go to put the T-Zones "tweak" onto it (lets me use T-Zones internet as opposed to EDGE) and it required a restart. Apparently the process is failing somewere and it keeps trying to make the fix and then start, then see's that there is a script set to run and is basically in a loop.

Best I can think of to fix things is to go back and restore 1.1.4 on it, then unlock everything, but then I have to re-enter all the contacts again and everything.

Is there a standard way to restore with everything you had? I know I may not have set it up and I'm out of luck this time, but in the future I'll set it up.