Here's what I know (it's very little mind you.)
-DR box must have the same: System Name, O/S and Netbackup Software Version as the Production system the catalog files are coming from.
-Place all necessary tapes, including catalog tapes, in the library.
-Set up any barcode rules on the DR box, if any were set on the Production box. The DR system may have issues reading the tapes if you don't apply the same rules on the DR system, that's why.
-Inventory library via Netbackup
-run the ‘bprecover’ command from the command line to recover the catalog files
I just don't know what switches you'd need to set on bprecover though and I'd like to know that, so if Mr. Bob Stump or any other user would like to chime in it would be most appreciated.