Where is your address book? You would have to copy your listbox values from the secondary data source into your main DOM in a repeating list. You need to do it with code.
To populate the list as secondary data source.
1. Tools
2. Data Connections
3. Click Add inside Data Connections window
4. Click Receive Data
5. Select SharePoint library list
6. Enter the location of the SharePoint
7. Then select your list
And just follow the wizard.
Stephanie Cantwell / Test ManagerQdabra® Software / Streamline data gathering to turn process into knowledge