Jonat?: Yeah, I know that extension, but it chokes with complex artwork. I tried once to use that extension to export the same flyer I linked in my previous message, and it took forever to complete. Using my hackish method you have your file ready to print in less than five minutes. Converting the exported RGB file to a CMYK tiff takes seconds with imagemagick. You can even use Phatch to create a script. With those options I'd say both ExportTIFFCMYK and ExportCMYKPDF extensions are the least I'd use. The idea is nice, but in practice they're too slow and memory consuming.