You could probably get this done with poking around in the file but If I were you I'd just copy and paste the morph dial settings:

• Load old character
• Load new blank
• Inject morphs (if you don't know which, just inject all)
• Select old character BODY
• Edit -> Copy
• Select new blank's BODY
• Edit -> Paste

Morph settings are transferred, you can delete the old character from the Poser scene (NOT the old file, just in case) and move on to transferring materials over, and save to a new file. 

You can also take the opportunity to slim it down with svdl's spawncharacter.py script, or some equivalent, and make a new single morph target that contains all the combined morph values, and then run the REM ALL pose to get rid of all the DAZ original deltas.

My Freebies