I am sure I am not stating any thing new. But since I use elements and not CS2, I do not have the channel mixer(or if I do, I have never seen it).
I use what is called the film and filter technique. I open two separate layers of hue/saturation. The first, I set the style to color, and label it filter. The second, I label film, and set the saturation slider all the way to the left. I then reopen the filter layer, and use the hue slider. As you slide left or right, you get different effects. Watching the bottom of the box, you can see what color filter you are applying. I then may also open a contrast layer and a levels layer for fine tuning.
But I also have theimagefactory's plug in B&W Pro3, I am very happy with that.
dcap, love your conversions. Very inspiring