images in NSTableView

FROM : Yann Disser
DATE : Mon May 12 11:27:26 2008

I need to display images in one column of a NSTable view. Right now, 
the column contains values like "green", "red", "red green", "blue" 
etc. I want to replace those strings with images of the corresponding 
color(s) - in the case of "red green" by two images, a red and a green 
one. I do not really understand, what I have to do to accomplish this.

Thanks for your help,
Yann