Hi Jared,
VPMS is an older method of assigning VLANs. Note that URT (User Registration Tool) is now EOS/EOL. The use of a switch as a VQP server is getting more difficult as fewer platforms support that. Using switches as VQP clients is also going to start to become more limited.
Your best bet is to move to 802.1X and use ACS to assign the VLAN on a per user basis (or per user group).