You can only copy a checklist within a set, such as from a base to a parallel. If they are entirely different sets (as it sounds like they should be), the checklist will need to be uploaded as any others are - via Excel or text on the site.
P.S. Just to clear up any confusion, it is a common misconception that there are site Admins. There are not. There is one Admin who owns this site. Admin is his username. There are several users who work on fixing Inaccuracy Reports, but they are not Admins in any way, just a group of people who like helping the site.
Nec Aspera Terrent
I'll never quit collecting entirely, but I am downsizing. Check out my COMC store and help me thin out what I don't want so I can buy cards that I do want. See something you like? Send me a message on here, and we can knock the price down quite a bit. I'll even take a bit of a loss if it means getting you a card you really want.