network-wide taxonomy with custompress

Hi all,
I bought CustomPress and I have created a network-wide taxonomy named "topic". Overall blogs the taxonomy was succefully created and, obviously, it was empty.

This is the problem: the only way to add items in the netwotk-wide taxonomy is to enter in every single blog and add same items every time! My need was to add items to network-wide taxonomies once. it is possible?

thank you