GIMP from our repo already does CMYK, but it produces negatives instead of positives of the separations, presumably on the basis they will be used in a photographic process. Colors->Components->Decompose, select the model from the list.
OMIGOSH! Thsi works! I have to inver the image afer separtion, but i works! Wow! Awesome! How the heck did I miss this???
Lenovo 14" ThinkPad Edge (0578F5U) with Core i3 Processor(i3-370M) 2.40 GHz 4GB RAM
Acer Aspire 9300 Laptop
Desktop Icy Dock system with AMD PHENOM X4 QUADCORE 9650 2.3GHZ 4MB L1 , NVidia GEFORCE 9400GT 1GB 2X DVI PCIE graphics card, 22" Chimei monitor.