HaloMods "Classic" Read-only Archive

I'm really new to halo ce and I was following a tut to make a map. I'm using 3ds 9. My problem is that when I select all the faces in the skybox and click flip under normal in surface properties, I get this:



Instead of this:



I don't know what I did wrong, It might even have something to do with the view, hell, I don't know.

Rightclick>Object properties. Back face culling i think

Thank You!