Clients don’t always realize why the picture they took on their cellphone or old 3.2 MP digital camera can’t be blown up for use on a trade show booth. Even in the hands of a skilled photoshop artist the picture can only be blown up so much. But 600%? There’s a group of Photoshop actions called Re-Sizer that claims to have Photoshop actions that will allow you to resize a photo up 600%. I don’t know all the ins and outs but at $10, it’s worth a look.