You will have to develop your own restore scripts.
Start with NBU commands manual to lookup bprestore.
There are many examples on the web and this forum.
Parameters you will need:
Source Client name as per the NBU policy that backed it up.
Destination Client name.
Policy type used for backup.
Time frame - if know exact backup date for client, use this as start and end-date.
File list to be restored (use -f <filename> to add multiple entries)
Destination for restore (if different to original) - add to <rename-file> and specify with -R <rename-file>
If you have DBs and/or Applications to restore such as SQL and Exchange, that is a totally different ballgame.....
You may want to explore BMR option if you need to perform complete restore as part of DR test.
