Here's simplified version of my dilemma: (Photoshop CS5.1)
A file contains 3 instances each of 2 unique Smart Objects. Is it possible to Replace Contents of all 6 objects so that they share a common source content?
Seems simple. Doesn't work.
Thanks for the quick confirmation.
Normally I would simply duplicate as you suggest, but my project has dozens of instances of several smart objects. Each has a unique set of transformations applied and frequently needs to be edited. So just looking to save some time. I shouldn't complain; using smart objects has saved me loads of time already.
The only other thing I can suggest is to post in the Photoshop Scripting forum to see if the scripting wizards there have a script to solve your issue.
(I couldn't script my way out of a paper bag myself.)