I am looking to go that route too, but I've been waiting until I find out if I can rig up one of these:
http://www.warn.com/powerplant_hd.shtml

with one of these:

http://cgi.ebay.com/KONG-MkII-Train-...QQcmdZViewItem

I am trying to see if it will all fit under my cladding Swordy and SPAZZ style!!! We'll see.....