T-SQL (SS2K8) :: Insert Text In A Text Field

CREATE TABLE [dbo].[instructions](
[site_no] [int] NOT NULL,
[instructions] [text] NULL
)
Select top 3 * from instructions

Output

Site_noInstructions
20Request PIN then proceed
21Request PIN if wrong request name
22Request PIN allowed to use only numbers

All text instructions start with “Request PIN” but after that the text are different for every site_no

I need insert in all site_no rows and after the “Request PIN” the text “and codeword” keeping the current rest of text

Desired output

Site_noInstructions
20Request PIN and codeword then proceed
21Request PIN and codeword if wrong request name
22Request PIN and codeword allowed to use only numbers