API macros are only for use with scenery design programs that can use them (and convert them to bgl). Programs like Airport or FSSC. These macro files don`t go in FS9. They go with your scenery source files and get compiled to proper scenery along with all the other items you may be using such as runways, textures or standard buildings.

I haven`t used EZScenery but I think it is a tool for placing libtrary objects into FS. Macros will be no use here. What is required is precompiled library objects.