There are various ways to do all those things. A MAT pose is just the 'materials' code blocks from the 'figure' section of a cr2, packaged as as a pz2. If you make a template file like this: {

version
    {
    number 3
    }

figure
    {

# Materials go above this line.
    }
}

You can copy the material blocks out of a cr2 and paste them into the place indicated in the above template. At a pinch it can be done using a text editor, but it is much easier to use a cr2 editor such as the free "CR2Builder", or "Cr2Editor", or the excellent (but not free) "Poser File Editor" from D3D. Since P6, there is an even easier way to make a MAT pose. First make a 'material collection' (mc6), then open it in a text editor and replace the line that reads "mtlCollection" with the line "figure". Now save the file back to a pose folder with a pz2 file extension. The important point to understand is that any pz2 (pose) file, is just a subset of what is in the cr2 (or other library file) that you are making the pose for. So you can create any kind of pz2 file by copying the parts from a cr2, and saving the result as a pz2 file. The above image shows materials being copied from a cr2 (left) to a pz2 template (right) in CR2Builder.