Help NOS Thunderbolt R&R


I am using a rooted Thunderbolt for quite a while. In the NYC area I get very nice 4G speed and call quality is fine for my needs. I have a wireless hotspot app so I use a tablet for surfing and leisure..

After yars off good use, I'm replacing the phone.

Is it possible to save an image .zip to my sdcard and unpack it on my new phone to avoid having to go through the root and restoration process?

4EXT recovery, ROM manager? which I use.