I'm getting a bit confused myself on this.
ualani has mentioned one thing in his last post that, although basic could have been missed.
After you downloaded and
unzipped the Totem Bight scenery, placed it in your
E:\FSX\Addon Scenery\Mistys Place folder did you in fact open the FSX Scenery Library and click on
Add Area then navigate to:
E:\FSX\Addon Scenery\Mistys Place click on and open the Totem Bight folder
click on the OK button
Then,
and this is important in FSX due to a bug. You have to place your cursor into the white are in the box above and click again.
The Totem Bight scenery then should be at the top of the FSX Scenery Library.
If it does click OK and the database and .cfg files will rebuild themselves (takes a bit of time)
After they rebuild you should still be seeing the FSX Library. Click on Free Flight and go fly the scenery.