The Complete Season 1 DVD set does NOT contain the unaired pilot.
The DVDs have a couple episodes with an audio commentary and a few deleted scenes... that's it.
From TVShowsOnDVD.com:
I've received a few emails from people asking why the pilot episode wasn't included on the DVD set. Apparently the pilot was constructed from a few episodes, deleted scenes, and discarded material, and it wasn't a very strong piece for the DVDs, so it was left off. The decision to remove it from the set was made after the announcement.
We're going to need someone to re-construct this for us after all since Sci-Fi isn't going to.