Group Everything With The Same First Two Letters

I'm working on a stored procedure that works fine. I just want to make it possible for the user to be able to have a drop down list in reporting services to display the "question codes" grouped by whatever the first two digits are. for example.

VT01
VT02
VT03
VN01
VN02
VN03
ST01
ST02
ST03

instead of listing everything, i want the viewers to see this
VT
VN
ST
or an alias for each of these like this:

Vet Tasks
Vet National
Survey Tasks
Survey National

any ideas, here's my current code, which is pullin up anything with the added substring part




Code Snippet
ALTER PROCEDURE [dbo].[Testing_Questions]
(@Region_Key int=null,@QuestionCode char(5))
AS
BEGIN

SELECT dbo.Qry_Questions.Territory,
dbo.Qry_Questions.SalesResponsible,
dbo.Qry_Questions.Customer,
dbo.Qry_Questions.Date,
dbo.Qry_Questions.StoreName,
dbo.Qry_Questions.PostCode,
dbo.Qry_Questions.Address2,
dbo.Qry_Questions.[Question Code],
dbo.Qry_Questions.Question,
dbo.Qry_Questions.[Response Type],
dbo.Qry_Questions.response,
dbo.Qry_Questions.sales_person_code,
dbo.Qry_Sales_Group.Region_Key,
dbo.Qry_Sales_Group.Region
FROM dbo.Qry_Questions
INNER JOIN dbo.Qry_Sales_Group
ON dbo.Qry_Questions.sales_person_code COLLATE SQL_Latin1_General_CP1_CI_AS = dbo.Qry_Sales_Group.SalesPerson_Purchaser_Code
WHERE REGION_KEY=@Region_Key
AND SUBSTRING(dbo.Qry_Questions.[Question Code],0,3)=@QuestionCode

END
SET NOCOUNT OFF