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In CCDsoft that would still fail as the software will automatically chose the brightest pixel in the image thinking it is the guide star. I have seen my autoguider go along nicely and then all of sudden hit 8 to 14 pixel guide errors due to selecting a hot pixel or camera artifact (Lodestar).
The best solution is a dark subtract. With an STi that is done simply by selecting autodark in the imaging menu and it takes a dark at the start and then reuses it continually through the session (it has shutter to be able to do this). It will not use a library dark though so you would have to be using Maxim that allows library darks for autoguiders.
So unless your guide camera is pretty clean and free of artifacts you need an STi or ST402ME or use Maxim.
Greg.
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