I have been working on a design in photoshop for a racecar, and some of the filers that I have tried to use do not work because the system runs out of memory. I have tied to increase the memory available to photoshop and have done the history purge. I have 3gigs of ram in my system. At what PPI or DPI and at what scale are most people working at? I have read that full size at 72 DPI was OK. My designs are printed on a Mutoh Falcon. Thanks