I tryed a few weeks ago backing up some files..
UNIX:
/opt/openv/netbackup/db/class
Here you can find basically all the policies
I have TAR that files... changed some polices and restore it up.
<veritas path>/netbackup/db/class
give a Try..
create a policy, copy it to another place..
change the policy,
and restore it..
Maybe it can help you