Restore backup images to alternate Netbackup environment

We have just completed a new Installation of Netbackup 7.5 across our sites, which replaces all other backup sytems including previous Netbackup installations.

Is there a way I can make all the old images/restore data available to the new Netbackup Environment for easy restoration? (there is now no tape library attached to the old environemnt as it is used on the new system)

Any advice appreciated.

Thanks.