Bob Herbst article at Unblinking Eye describes a traditional method for enlarged negatives. It seems simpler than some of the digi-neg methods (especially if you include all the post-scan photoshop work) & alot cheaper if you have an enlarger. I've used imagesetter negs for contact prints on Azo, but disliked the loss of process control & will be trying Herbst method soon. If you're looking to sell prints, a traditional 8X10 contact print should be a good, price-leader for enlarged prints.