1. get the latest videolan client for your platform www.videolan.org
2. install, start it and open the preferences
3. activate the atmolight module
4. configure the actual atmolight module
and if you are also using the light strips from DealExtreme, the following settings could be helpful to get a good whitebalance and nice overall response.
But still needs some adjustment.
just scroll a bit down in the atmolight modules preferences to find these settings
5. now just start a video and love it ... :D