Yeah, the script load the textures in game, but just if there are textures.
For now, about all you can do is distribute those files with your map or wait for build 18 to come out.
My problem is, that the map should download the textures also with the other builds, i know a lot of people playing with build 14 or 15. I understood your text (quote) so, that i should do some brushes out of the map and gave them these 16 different textures, that they download with the map.
For this i want to load the textures, not for the flames.