I remember trying to import KORS - Orcas Island and it was a total bust.
And it's been so long ago, I can't remember all the specific problems.
Seems like it was more than just graphics, elevations were off by quite a bit too, animations weren't working...
Now...
Orbx has released FTX NA Blue: Pacific Northwest, or PNW as it is known by the community.
http://fullterrain.com/product_nablue.html
It is a base scenery, but almost all of the default airports have had tweaking done to them.
Here's the good part...
In their own "extra special attention to detail" way they are releasing new versions of the old GeoRender series airports.
Frankly, after you see all of the extra detail in Orbx's FSX versions, you really won't want to go back.
Here is the new Darrington, for an example:
(The entire town has been done!)
http://fullterrain.com/product_us1S2.html
KORS - Orcas Island is on the list of airports to be released.
Plus, a group of freeware designers, OZx, just released a frreware pack of airstrips this week, for the PNW scenery, and will be continuing to do so:
http://aussiex.org/forum/index.php?showtopic=5851
So, my recommendation if you have the means, is to invest in this new scenery instead.
They recently have cut prices to affordable levels.
It's totally FSX compliant, and way more detailed than even the GeoRender series.
Give the screenshots and videos at the links above a good view.
My opinion, you really won't be disappointed.