Just a quick FYI - Bob's mod also works great on a '98; it even provides these additional benefits:
1. With the driver's door open, key in the ACC position, and engine off, hitting the button not only silences the door chime, but also shuts off the interior lights.
2. With the driver's door open, key in the ON position, and engine running, hitting the button shuts off the interior lights and also turns off the "door ajar" light on the instrument panel (there is no chime when the engine is running and the door is open).
The only exception to the above is that, if the interior lights are on for any reason other than the driver's door being open, then hitting the button will not kill the interior lights - they will stay on, as desired.
^(As far as I know, the same is true for the '99).