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i noticed that on the drawinfo test server these two materials had two interesting additions, any wish to explain the highlighted please?

material
name spheremap
diffuse 0.25 0.25 0.25 1
specular 0.25 0.25 0.75 1
shininess 64
addtexture caution
spheremap
end

material
name sphere
diffuse 0.5 0.5 0.5 1
specular 0.25 0.25 0.75 1
shininess 64
noradar
addtexture caution
end

I believe the second one makes it not appear on radar.

The first one makes the texture appear as if it is on a sphere, even if it is not. It makes a low-polygon textured sphere look like a higher-polygon one.
Try using spheremap on a box

Another interesting one is noshadow, this one I find useful for preventing a clear window, etc from casting a shadow.