TDBComboLookup

I've used a TDBLookupCombo to do a lookup from a 2nd table. Example:
select 'Green' from the 2nd table and store '2' in the original table.
It works GREAT. Now I want to pull the '2' out of the original table and
look-up and display 'Green' from the 2nd table having it look like it's
really coming from the original. Can the same TDBLookupCombo do this by
changing some of the properties? What am i missing?