I just installed your newly Hill AFB (KHIF), but are getting these square blocks (click thumbnails). Are we suppose to download/install any scenery objects? It looks like it's suppose to be trees (but not too sure).
I had the same problem. I removed the file "EZ_Hill Trees.bgl" from the Hill AFB (KHIF) folder in the FS9 addon scenery folder and the boxes are gone. So whatever trees that that .blg is for are missing their textures. Hope this helps,
-Adam