There are a lot of useless material and light sets that were created for Poser 6 or prior versions of Poser. I don't understand why there are still in new Poser versions.

The Face Room - never used it.

The Hair Room - I used it and gave up... wish there were something easier to handle (like the Cloth or the Fitting Room)

The Content Tab - I always delete certain lines in roomTabs.xml so it looks like this: