There seems to be no way to just take the config of one, change the IP (all the rest of the info is the same), and just stuff it back in the other cache.
Well, the way I'd do it is pick an ftp or http server that I like, and type
show config.* > ftp://myserver/configsave.cfg
I'd remove the IP addresses and hostname from the file with an editor, then type
source ftp://myserver/configsave.cfg
on the new machine.
--bob--