The JConcepts front wing bolts to the back of the shocktower with two included 2-56 button head screws. You have to drill the holes in the tower for it. The best (only) picture I could find of one mounted is here:
http://www.jconcepts.net/files/thumb...ont_wing_2.jpg
Mount it up just enough that the body can slip underneath it. You'll probably have to trim on the sides of the wing to make sure it clears the shocks through all travel, too.
I posted the a set-up for the X - 6 with lipo above in this thread, here's the link again:
http://www.2wdrc.com/pdfs/Setup-Sinc...HotRod2008.pdf. For medium- to high-bite tracks I really recommend it.