I still occasionally use Custom Color Tools V.3.2 (©2005 Kodak). The published requirements are OSX 1.4 and Photoshop CS1, but I am successfully using it on a G5 Mac with Photoshop CS2. I think that's the limit, however. The big problem these days would be Kodak's licensing scheme, installing the software and getting it to run takes some co-operation from someone at Kodak. I remember when I transferred the license from a G4 to the current G5 it was a painful experience. The software is keyed to a specific MAC Address, and needs to be reconfigured by Kodak, I forget exactly how. All I know is that I never want to do it again, so that G5 better not die... But it's worth it, the concept of being able to edit a profile using the tools one is familiar with in Photoshop is both obvious and brilliant. Chris Protopapas