Hit Ctrl-Shift-P and go to "Bitmap". Enter "300" in the "Resolution for Create Bitmap Copy" box. Close the dialog.
Select what you want to color-separate. Hit "Alt-B" (make bitmap copy).
Right-click the bitmap and select "Image Properties". Copy the URL of the bitmap (top edit box, right-click, select "Copy").
Go to you favorite color sep program. Go to the file open dialog and paste the url in the filename field. Click OK. Sep your art (read the manual), print you films.
This works with any art, including photographic content.
You can get free trials for most sepping programs.