Pete,
To do that in SGP you'd need to enter the RA and Dec very precisely where you want to sync (what a plate solver does). I would think this would be very difficult and tedious from an end user perspective.
I would recommend you either go the plate solve route or do the 3 star alignment with your mount hardware. Even with the hand controller you can manually center the star and sync using the hand controller. Unfortunately the 3 star alignment is done entirely in the hand controller and SGP doesn't know it's going on and has no way of knowing where the mount is trying to go.
Thanks,
Jared