In case you want to fly a bit outside of Misty's area like the Northwest Territories you might be interested in a download at AVSIM named:
nwt_landscape.zip
While the author calls it landscapes it is actually landclass and mesh for the NWT. It makes all the difference in the world to what FSX looks like. The file has 3 automated .gif files that show default and the new scenery for three different areas so you can compare instantly.
Enjoy.
EDIT:
filename corrected.