Upgrading manually ASD2.1 scenery

Dear All:I have made an apron texture parallel to my airport polygon 154 degrees, the texture is 26x256 pixels, but ASD2.1 shows the polygon with white color, if i chenge the texture to the r8 format the texture appear , but it loss colors.Is there way to change the SCASM source code to allow me assign bmp textures to apron polygons and add nigh light effects to the ground polygons?SCASM can compile 512 x512 bmp textures for ground polyogns (Apron polygons) ?Thanks.Alfredo Mendiola LoyolaLima PeruThanks.Alfredo Mendiola LoyolaLima Peru