When the value is stored in the table, I would like the add the prefix "The Great State of " to that State name.
To what or where? This would be an example of a calculation, which you should not store except in rare cases, and this isn't one of them. If you want to see this in an unbound form textbox or report, it would be a calculated control - e.g. ="The Great State of " & cmbState where cmbState is the name of your combo. If that gives the wrong result, you probably need to specify which combo column. That is a zero based value, so column(0) is the first column.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.