Birthday Widget with First name e last name

Hi, first, thanks, yours is a great plugin, does very well the own job, But I need to display in widget both surname and firts name of a buddypress user, instead it show always only the last name, How can I do for resolve this problem? Furthermore, I have tried also to change display name as (i.e.) <Name (buddyPress)> in ComboBox “Meta value as name” (WordPress User Tab) , but unsuccessfull.
Help me please
Pierluigi