Hi Polar Bear.
That Saab is really looking the business!
The photos are done with the model sitting on a piece of paper card.
You can buy this in the hobby shops that sell oil paint,pastels etc.More of an art shop than a hobby shop. They sell both card and paper card and its very cheap.I have a piece of purple card that I use but that blue looks really cool.Think I'll get myself something similar.
Bear in mind that depending on what lighting you use the card will come out different colours.With a flash my purple card looks blue.
Very easy to do,I think theres an article on Armorama about it somewhere as well.
Heres one of mine.

Its a good excuse to get a photo of a Spitfire in a thread :-)
Hope this helps,and looking forward to seeing the photos of the finished Draken!
Nige