and/or PM 7.1 prior to SP1. I'd keep a test or legacy NS, possibly virtualised with only one processor and 1Gb RAM and copy them manually as you need them or Export/Import them.
I've noticed that the Inventory Rules that came with Patch Management aren't always the same as the ones available to users, if you try to copy the fields you may find you need extra ones or you'll have to change them in some way.