Personally, I've got P5, I'd use it. I'd like to see a lot more stuff that uses procedurals from the Material Room- saves me the trouble of going in and tweaking all those nodes to get my raytracing to look right. But then again, I'm lazy. Maybe it would be possible to just apply the textures individually to a large square and render that, then crop and include in the pack for those who want to use them?