What if I duplicate the value list 4 times, adding a suffix to distinguish them, migrate the data, then reduce the value lists?
My basically, my only question is how to migrate values from one list to another.
It's a return-delimited list. I usually copy in the dialog, paste into text editor and do what I need from there.
There are functions that might help you extract, but you'd still have to create the value lists and use the extracted values (in global fields - that are used for the new value lists, perhaps, or repasted into the new value lists).
p.s. here's an article on Value Lists that might help: