Exporting 3DS files for EZ-Scenery or Rwy12

Gday all,
I have some 3DS files that i would like to use in EZ-Scenery or if easier Rwy12. I have no idea how to go about it, i read somewhere you should export them as BGL files but cannot find an option to do it in GMAX just MDLs...
Thanks for the help
Rob
I have some 3DS files that i would like to use in EZ-Scenery or if easier Rwy12. I have no idea how to go about it, i read somewhere you should export them as BGL files but cannot find an option to do it in GMAX just MDLs...
Thanks for the help
Rob