You can use it to create a backup. But this software is not supported in the list of third party software that may be installed on Cisco callmanager. When I perform an upgrade, i always take a system image (using softwares like Ghost or Acronis trueimage) in case the upgrade fails. If you have a server that support drive removal, thats more than enough.
If you run into trouble, TAC wont help you with out uninstalling ghost out of there.
Also here is a list of TP software that are supported.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/prod_bulletin0900aecd800f8572.html
HTH
Sankar
PS: Please remember to rate posts!
Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus