Has anyone tried to add a 2nd HD to a destop 233G3? Is it possible? I'm running out of space. I suppose the alternative would be to change the HD, which as long as my back-up works OK would probably work, but I would prefer to install a 2nd HD. If I am unable to install a 2nd, does anyone know if any ATA HD will work? There seemds to be a lot of variation in what I see.