rfriend, the basic rundown is......

I skip the stud wall, as I am applying heavy planks at least 1-1/2" thick plus to the timber frame and attaching the foam directly to the planks. I like to see 2" planks, there is less chance of the screws showing through the inside. The planks are the inside finish and the sheathing as well. I use panel screws from the s.i.p. industry as they come in various lengths, I fine tune the length with the thickness of the strapping which is applied to the outside of the foam to hold it in place.

In the pdf you will see they use a vapor barrier, poly and ice and water in different applications. I don't. I would recommend paying attention around the window and door opening as this type of house will not breath at all and the cold windows will sweat at these points, Ice and Water around the window box is needed and use window drains in the sill, there is some prefabbed stuff available for this purpose.

Tim