Blasted my poor memory...
Right, due to my little problem of not beeing able to remember names very well I forgot who asked for a RGB 2 CMYK converter in #stardock the other day. So if you are out there; here it is.
Note, it does not account for any colour profiles for monitor or printer installed. It's merely using a standard matrix and will therefor not give same result as Photoshop and smilar applications. (If anyone knows of some good reasources about this it'd be much appreciated)