Cheers, John. I'm still experimenting. I've just figured out how to set red, orange, yellow or blues filters in-camera in the Mono setting. I haven't put them in the computer yet, but the red filter mono setting looks great on the LCD screen.
Of course, as I'm shooting raw, all the colour information is recorded too, and in SPP I can call any of it up. So, in-camera settings in RAW are really best used for composition, and when you open up SPP that is what you will see, but you can change it to colour, not so much a conversion as an opening up of the colour info in the raw file.
If I shoot in colour, then decide to go b&w, I prefer to do that in SPP as the RGB filter within the Monochrome editing window is really excellent. I go to Lightroom for cataloging and toning, as the response is much quicker, and there is more control to be had.