I'm going to test that, but I'm not sure how to edit the file with what you have there. I exported a simple scene and I want to test the material on the Poser sphere. In a text editor, it looks like this:

#----->   BallUV3_1/Preview    <-----

MakeNamedMaterial "BallUV3_1/Preview" "string type" ["glossy"]
"color Kd" [0.576470414797 0.576470414797 0.576470414797]
"color Ks" [0.0 0.0 0.0]
"float uroughness" [0.258086156304]
"float vroughness" [0.258086156304]

So how do I put the above onto the ball? I'm sorry, it's not clear to me.

"A lonely climber walks a tightrope to where dreams are born and never die!" - Billy Thorpe, song: Edge of Madness, album: East of Eden's Gate

Weapons of choice:

Poser Pro 2012, SR2, Paintshop Pro 8