You could try this:

Try the blowdrying trick again, but place the mouse in a small carboard box or something similar while blow drying. Once you're done, take the mouse out and put the snake in. The box should smell like the mouse to the snake at this point. Let is sit there for a little while, then introduce the mouse. Dangle it a little but not in it's face(give it about a 3-4 inches) and then begin moving it away like the mouse is trying to run. Sometime the thought of food getting away will trigger an attack.

Using the cardboard box may be a bit more representative of a mouse nest, especially if the sent is everywhere.