Decks, Patios, Porches and Docks - Difficult ledger attachment

My deck will span out from the 2nd story 16', and use 2x10 joists, spaced every 12". I plan on cutting away the siding to attach the ledger.

As you can see in the 3rd picture, I only have 9 1/2" between the bottom of the door trim and the seam in the siding. I recently cut out a section of this siding to reveal what was underneath, and found foam-board insulation under the siding. As you can see in the 1st picture, under the insulation revealed the framing of the house, which consists of a (vertical) 2x8 on top of two (horizontal) 2x4s. Inside the house, on the wall shown, is all drywall, so I cannot see any of the framing below the seam in the siding, and don't know if there is anything to properly bolt a ledger to. (Only the lower level ceiling is unfinished, so I can see the 2x8, a 2x4, and the upper level floor joists).

What size ledger should I use, where should I position it, and what is the best way to bolt it to the structure?

click on thumbnails to enlarge pictures
http://img232.imageshack.us/img232/8311/siding1ar6.th.jpg (http://img232.imageshack.us/my.php?image=siding1ar6.jpg)
http://img232.imageshack.us/img232/281/siding2jv7.th.jpg (http://img232.imageshack.us/my.php?image=siding2jv7.jpg)
http://img232.imageshack.us/img232/3195/siding3cq5.th.jpg (http://img232.imageshack.us/my.php?image=siding3cq5.jpg)

You will want to attach your ledger to the rim joist of the house, directly under the threshold of the door. The flooring (assuming 5/4 lumber) will stand proud and fall about 3/8" below the lip of the threshold. The 9 1/2" below the threshold is exactly what you will need to attach the 2x10 ledger. Of course you will want to flash over the top of the joists and under the siding on either side of and at the threshold to prevent water infiltration. The framing under the top joist and the two 2x4's will be the studs for the room below it, if any, and/or a monolithic wall if it is a basement. If you have the access from underneath, as you state, use 6" x 1/2" carriage bolts every 3' to secure the ledger to the house. Hope this helped some.

Thanks for the reply. I was a little leary of doing it this way because of the tight fit for the ledger, and only being able to bolt the top half of the 2x10 ledger to the structure.
However, it looks like this is my only reasonable option.

Tis far better to bolt the top half rather than the bottom half dur to rotation of the joist.