I used 3-M Spray adhesive. It worked very well. They have a regular strength and an extra strength. I used the extra strength. It was probably the same thing in a different package for 2 dollars more. It works like contact adhesive. Spray both sides wait a while and stick. Not much room for error. I know I was very tense when I did it.
Just be careful the spray seems to find its way all over the place.
Good luck
Here is a link to some pictures that might help. There are some of the completed dash.
http://www.jamswebdesign.com/cobra2/