I have been playing around with my DCCD over the past few weeks to better understand what the functionality is and what settings are are better suited for my driving style. I only wish the STi had a memmory setting for all these variables as I now have a routine when I get into the car to ensure it is set up proper for me.
After starting the engine:
1. Move the SI Drive setting to Sport #
2. Push VDC button in and activate green VDC symbol on my dash.
3. Move the DCCD selection to Auto -
The logic for the settings is best explained in the following images and text I found and the internet.






I also found this on YouTube if you have a short attention span and issues with reading
http://www.youtube.com/watch?v=ibM5nb3j7j8