I'll spare you the Gory details but... I want to know which is the OLDEST version of Photoshop that will run on an Intel MacBook running Leopard. When I say 'old' I mean either legacy Photoshop or the CS series. My 'Old School' trick is based on the experience that the oldest versions of a software, typically occupied the smallest disc space. I just need 24bit environment but need all by usual PS tools. Thanks!