Restore from Cyanogen to stock with two phones?

view story

http://androidforums.com – I've got two HTC CDMA Desires. One of them has Cyanogen mod, but due to loss of functions such as outgoing text and camera, I want to revert it back to stock. Drumroll.... I didn't make a backup prior to install Cyanogen. I also have an identical HTC Desire that's completely stock. Both phones are on the same carrier. Is it possible for me to use the fresh new phone to make a ROM to update the modded phone back to Stock? If so, what would the correct procedure be? Use Revolutionary on the new phone, then Titanium Backup, make a backup to the SD card, then update the modified phone by insta (General)