How to back up Multis?

My issue is this - how do I back up my Multi bank so that I can restore a single Multi to the virus afterwards without affecting the rest of the bank?

I'd like to be able to back up the entire Multi bank, then completely wipe the instrument and create an entirely new set of Multis. Then, I would like to take some of the Multis from the backup and put them back on the Virus to create a combined Multi set. Does that make sense?

Thanks!

I guess 'dump arrangement' into sysex librarian seems to let me store and retrieve a single multi at a time, is there a better way?