To make a mat pose
save a material collection
rename the file from an mc6 to an pz2 file
move it and its thumbnail to the POSES folder (make a sunfolder for it )
open the file in wordpad and change the line mtlcollection to figure
save the new Mat Pose and test

a mat pose wont ork on a prop unless certain conditions are met , but they work on figures

for a prop use actor $CURRENT and make sure its selected before applying the mat pose

No need for mat pose writers in Poser 7 or 8 , dunno about 6

If you copy the mc6 first you will have both the material collection for poser and a mat pose for Daz studio. A material collection WILL apply to a prop, so they are the better option to use .