I need help to populate a certain selection from a drop-down (combo box).........OK I have a field named REP ID/REP NAME....(Rep stands for contractor)....Each Rep is assigned an ID and the first two numbers in the rep ID correspond to the territory in which they sell products...So for example 5830 John,Smith the 58 would be Northern California....Now what I want to create is a field named TEAM which would consist of Team A through Team D....Every Team is associated with different territory numbers to lets say I click 5830 John, Smith I would want Team A to automatically be populated in the TEAM field....Someone please helpp....And I hope I described it correctly

You don't need to do this. Assuming you have a table that equates the Territories to the Teams, you just need to join those 2 tables to get the Team info.