Hi All,
OK,managed to work this one out.
It can be done and it involves setting up the appropriate database on which CiscoSecure is running, ie Oracle or SQLANywhere.
Each database type has separate ways of replication and more to the point, of doing a peer-to-peer replication which typically syncs two or more CiscoSecure ACS databases.
If you look up "CiscoSecure replication", you will find a couple of documents which are very informative.
Regards
Andrew Morris