Do you have any problem?
Catalog are recoreded as they are under /usr/openv directory, and restored under /usr/openv.
Although you specified a different location on installation, NB works as it is placed under /usr/openv. /usr/openv is symbolic link.
# bprecover -l -m QRT079 -d hcart2
Database Backup Information from QRT079
Created: 04/04/06 21:56:58
Server: nbserv
Block size: 32768
Path
----
IMAGE1 /usr/openv/netbackup/db
IMAGE2 /usr/openv/volmgr/database
IMAGE3 /usr/openv/var
# ls -l /usr/openv
lrwxrwxrwx 1 root other 10 Mar 8 14:28 /usr/openv -> /opt/openv