Dave Evans is famous for using/discovering CGDGAD, although he does use other tunings. It might work if you try that.
I really don't fancy CGADAD - never heard of it! It sounds like a guitar-torturing string breaker to me!
Aah! Just looked on You Tube - there are two Whistling Milkman videos. One of them is in CGDGAD:http://www.youtube.com/watch?v=DdjcImz0JIE
I reckon the other one is also in that tuning - the guy has just written it up wrong in the comment!
Evans' stuff is really nice - I wish I'd heard him live back in the day. Apparently he throws pots and brews beer somewhere in Belgium these days.