This should do it

CREATE TABLE #srvroles(ServerRole VARCHAR(20), Membername VARCHAR(200), MEMBERSID VARBINARY(MAX))

GO

INSERT #srvroles EXEC sp_helpsrvrolemember

SELECT 'EXEC master..sp_addsrvrolemember @loginame = N'+''''+MemberName+''''+','+'@rolename = N'+''''+ServerRole+''''

FROM #srvroles

GO

DROP TABLE #srvroles