I installed a Bi Xenon HID kit from http://www.carhidkits.com/dodge-74/r...k-hid-kit-177/
a couple weeks ago and love them. I found the dual headlights from Dodge to be the worst headlights I've ever used.
Considering you have a Big Horn, you may have the quad headlights an won't need a Bi Xenon Kit, just a regular kit that replaces both your high and low beam bulbs.
They include a resistor in the kit which takes care of the DTR lights here in Canada. They have great customer service and mark the package as a gift for customs...no duty or brokerage fees!!!!
The video on their site is very well done and answers everything you need.
It took me 2hrs to install.... would have been quicker but it was -22C and my truck doesn't fit all the way in my garage so I was freezing!!!