I have CS running on Snow Leopard and I've downloaded some profiles from a print shop in the UK, copied them to library/colorsync/profiles but they don't show as loaded when I do view/proof setup. When I click load and locate the profiles they show as faded out e.g. unavailable. They are real profiles from Fuji and Epson. I am lost so any help would be greatly appreciated.
Those sound like print profiles. Usually you can select those in your RIP and sometimes your print driver depending on how sophisticated it is. Try opening your Color Sync Utility and see if you can work with them there.