>I think you can get rid of both the scan and the seek:
>
>

>FOR nMonth = 1 TO 12
>	* Get the Carrier ID (Matches GrpID and PlanKey) 
>	* and the Benefit Name (Matches PlanKey).
>	lcCursor	= "tmpNearly" + PADL(nMonth, 2, "0")
>	
>	UPDATE (lcCursor) SET CarrID = G.Carr, Benefit = G.CovDesc8 ;
>		FROM GrpsPlansCarrs G WHERE &lcCursor..GrpID + &lcCursor..PlanKey = g.Full_Key
>
>	* You should replace g.Full_Key to whatever the key is on GrpsPlansCarrs 	
>ENDFOR
>

You need to use JOIN condition, e.g.

UPDATE cur SET CarrID = G.Carr, Benefit = G.CovDesc8 ;
		FROM GrpsPlansCarrs G INNER JOIN (lcCursor) cur ;
                                       ON cur.GrpID + cur.PlanKey = g.Full_Key