Doe anyone know how to convert XML files to bgl files

I have never tried this but if some one would guide me I would like to give it a try

I have a dream, I would like to be able to do the following; make a practice base somewhere in NM that has 4 runways with ILS approaches to each runway be completely surrounded by relative high mountains with one way in and one way out. No trees closer than 15 mile on the approach end of the runways ...