I'm looking at doing the same thing! Here is my 2 cents:
After building the hull S&G, I was going to build a strong back of sorts using the offsets provided in Guillemont's book and measurments taken directly from the S&G hull. (Perhaps build the strong back before gluing the hull up and using it as a form there as well.) I'm sure there will be a bit of 'off the cuff' cutting and 'eyeballing' the lines but, that's half the fun of making something. In the end, it's really yours.
Once the strong back is made and everything looks straight and fair, it's just a matter of figuring out how to lay your strips.
Joining the deck and hull with glass tape seems to be the easiest and plenty strong.
Adding enough forms under the deck to make a nice designe with the strips would be cause for considerable weight. I wouldn't leave any forms except for the two bulkheads and maybe a strip under the cockpit. (I'll be using carbon fiber in various places to re-enforce mine)
Hope this helps. And with any luck we'll get that "Hey, I did this same thing last winter and... " posting.
Ciao,
-David

: Hi Guys,

: Well, seems the wind has changed course, and I'm being blown along with it.
: I've decided I'd really like to put a cedar strip deck on a Guillemot Stich
: and Glue hull. I've already received the plywood, so I'd really like to
: use it. (I now have enough wood for three boats doing this, maybe I'll
: have enough practice to post somthing usefull when I am done on how I did
: it)

: Here is the two options I've come up with: a) build supports for under the
: deck, which attach to the gunwhale, and plank then over them (so they
: remain part of the Kayak), or,
: b) try and build stations and build it more traditionally, where the stations
: are removed.

: I'd appreciate any opinions on which way to go, as well as any direction on
: other parts of the process. I've never build a kayak, but have made a
: cedar strip canoe.

: I figure option A will produce an easy to fit deck, but at what cost
: (weight?).

: Thanks,

: Myrl