selecting contacts

Hi All.
I have some code that iterates thru the contact to show only contacts with a mobile phone number.
I then use InputMap to display the contacts the user can select, BUT when the data map is returned after the user closes the dialog show by InputMap all I get is the key value and wether or not the item was selected(true or false).
When I add contacts to the map passed to InputMap I pass in the contact name and the contact ID using the myMap.PUT() function.
I need the contact ID because I cant rely on the name passed back as I or the user might have multiple contacts with the same name.....for whatever reason.
How would I tackle this to get the result I am after?
I thought about using a type, but when the map data is displayed in the dialog, it will show the items of the type rather than the name as it does now.

Any help appreciated. I am sure I am not the first to have this problem

Thanks, Jeremy