No you do not need to reapply the 4in1s. MS has included the most recent Via drivers. Once you install the Sp open the dev Manager and update the drivers. Allow the OS to search for the newest drivers (should be dated 4/01)and install. I am currently running W2K server on an ABIT VP6 with SP2 slipstreamed (installed with SP2 Intregrated) and the system is extremely stable.