Migrating Cisco Wireless Control System to a new host

Have to move a redhat system from a physical box to a vmware host.  I do not want to keep all the data and especially wanted to keep the MAP.  Maybe there is a Cisco "official" way to do a export and import, or restore from the backup.   But I wanted try just copying it over, and in the meant time upgrading to the latest version.  Here are the steps:

1). Stopped WCS service and use tar to backup the whole installation folder of existing WCS
2). untar the backup to the new host in the same path
3). copied /var/.com.zerog.registry.xml to the new host /var/.com.zerog.registry.xml
4). run the latest WCS installation binary, and it worked!  WCS is back and running and upgraded very fast!