Lighting Automation Questions

[trailshredder]

I am considering some lighting automation with X10 in a home theater that I am in the process of building.  I am leaning toward using the X10 wall switch (WS467) to control my lights remotely.  My ultimate goal is to be able to press a button on my logitech harmony remote that will launch a macro that dims the lights to say 50% brightness, then after 3 minutes, turn them off.  What all do i need to accomplish this task?  The remote is infra red.