Graeme, It's actually rather the contrary I need to do. This is a Windows driver and I don't have a choice of the "printer" profile (Destination). It's the Source profile that I have control of. There, I think the problem is different as I don't see how I could short-circuit that transformation or prevent the conversion? The more I think about this the more I think that this will nor work because I'd be profiling on top of an existing profile. Seems that this would be possible on Output but not in Input. Roger Breton