Membership Directory – phone numbers?

I’ve set up a WordPress Multisite and installed a bevy of WMPU DEV plugins to manage a large (3000+ members) club including Events+, e-Newsletter, Forums, Membership, etc. Membership Directory seems to be the plugin I would use to have a searchable list of members but I would like to include their phone number as well. What would I have to modify to add other fields and have Membership Directory pass them back? I have a huge excel file with lots of users to import (via Batch Create!) but the phone number is a sticking point.

Much thanks for any help.