(Update: this is the previous version of SimRip. Please see the new version above.)
In this video I start with a ready to print color separation. You can see the channels in the top left. First, I close the separation I am about to rip, and load the SimRip script from the Scripts menu. I am presented with an options window, and choose the options I prefer. Next, I am prompted for the document to rip, and select it in the Open window.
The script makes a copy of the file and processes the channels.