When I first bought my CanoScan 8800F and set about scanning my old slides I was a bit enthusiastic and scanned at the default resolution. The resulting images, when printed, were poor quality. I have now started re-scanning all 124 slides at 4800dpi (or is it ppi?). The trouble is that when I enhance them or change their sizes Photoshop takes age to complete the operation. Should I scan at 4800 or 2400 then resize the images to 600 before doing any enhancing? Is there some way to scan slides so that they print at an acceptable resolution but do not involve hours of waiting?