If you want to create a Poser 6 MAT Pose, here is a solution (for figures):

In Poser, with your character set up:

1° Go in the material room;
2° Click the "+" thingie at bottom of the material library.
3° A dialog will open. Choose "Create a MATERIAL COLLECTION" and select the body part you want to be in the MAT pose.
Also, give the name you want.

The material collection is a Poser 6 MAT pose, that can be loaded from the Material library.
You can then create a MAT pose that can be loaded from the pose library by doing this two steps:

• rename the extension from the MAT pose (mc6 to pz2)
• edit the file and rename the "mtlcollection" to "figure".

Also, in my opinion, if you do a Poser 6 specific material, let it in as a Material Collection. The pose library is already full of other things.

Hope it helps,

Basil