I purchased my radio from BikeTronics a year or so ago. It installs very easy. I called them several times with questions and they were extremely helpfull. If I remember right, it came with a complete set of instructions.
Good luck.
GlideMan (not sure of spelling) posted pics(of the inside of the fairing)of his Biketronics installation a couple of months ago--try the search function.
As mentioned, it is a very straightforward installation.
Did mine last night after work, it took about 45 minutes start-to-finish. Light rain on the ride in this morning and I could still hear everything decently at 65mph with the full face helmet closed. Not "concert hall sound" of course but sounded pretty good.