Is there a way to do the reverse save?
The only way I know is to "Save Bodies". Under Create Assembly hit Browse and name the Assembly and it will generate one.
No and yes. No in the sense is that there would be no history in components and all dumb bodies plus they would be linked to part (if you want you can break the link).
Yes in the sense is the method by Scott. See more details here: Assembly from Part – No mates required
Retrieving data ...