Thanks for the link. I have looked at a few of the tutorial videos, and find that they go into quite a good level of detail, and practical explanations. In particular, the workflow presentation by Erik Allin is quite practical - i.e. he is saying the way in which he does it. I have only used dpp occasionally, mainly just to view raw images, but I think I may well move that way, instead of using the cs2 raw conversion.
Best wishes,
Ray