Cascading Combos: Changing Which Field Is Displayed Once Selected

I have set up a form which has 2 combos.

Combo A pulls from a query which gets surgery address1, address2, and surgeryID. It displays only the first 2 fields.

Combo B gets info from a query getting staff firstname, surname, title, staffID and surgeryID, and shows the first 3 fields.

I have the following code in the afterupdate of box A (surgery_combo)

Private Sub surgery_combo_AfterUpdate()
staff_combo = 0
staff_combo.Requery
End Sub



HERE IS THE PROBLEM:

The queries seem to work fine, as box B displays the staff that work at each surgery. However on selecting a staff member, you can only SELECT the ones who have a salutation (mr/mrs etc) in the first column. And when you DO select this - the combo shows a most unhelpful "Mr" whereas I want the name there.

How do I change the column that the combo displays once selected?