Before downloading your demo version of Printfab 2.04 for MAC OS X
I checked your list of supported printers. Much to my surprise it listed my Canon PIXMA MP450. I then downloaded and installed the demo version. After reviewing the drivers that were installed, there does not appear to be a driver for the Canon PIXMA MP450. I tried other MP drivers in the list but none are compatible. Did I miss something here? I believe I downloaded the non binary version.