I keep asking myself why anyone would want to do this (since P6 material collections are better than MAT poses), but then I came up with a reason: Poser 7 wishlist item #999: ability to load MC6/MT5 library presets from the Pose Room. We should only have to go into the Material Room if we want to modify or create new materials. As an addendum, there is a UI glitch that allows the material library to be accessed from the Pose Room, but I cannot get it to work but once in a blue moon.