If you have just downloaded this airfield for FSX, the package has 2 bgls with an alpha issue which you probably have already noticed. (Two old sheds at the Glide Club area) Because of this error, I will fast track a v3 for blending into the fsx default landscape, and I will add the replacement files with that upload.
Also if you did not already notice, the texture file <dirtroads.bmp> should be singular i.e. <dirtroad.bmp>. . Backup original of the same name and alter the filename
Apologies for the inconvenience and especially if this is not an acceptable usage of a Post.