Argh!

In the middle of an A/C rebuild- I've got the car in a million pieces and am stuck. While I have managed to remove everything else, I simply cannot get the evaporator out of the case. Bentley just says 'slide it out', well, that's not happening. Does anyone know any tricks? My guess is that all the sealing foam is holding it in there, but I'm not sure. I would hate to pull the entire heater core....
Here are some links to pics to illustrate the mess I'm making.
Condensor and radiator out

Some of the parts out

Stuck evaporator

If I can pull this off I promise to do a thorough write-up for Bruno or whoever's interested.

-Rob