I use displacement maps instead of Poser 4 bump maps and have used the blender nodes too. I don't think I have seen freestuff textures using Poser 5 capabilities or even for sale which is sad. Poser 5 has a wealth of new features but sadly is still ridden with bugs, its memory management is horrendous and most important Curious Labs shoot itself in the foot by not going over their way to get compatibility with DAZ models. If Poser 5 would have catered to DAZ figures instead of ignoring them, even buggy as it still is now it would have enjoyed a lot more support by the community since DAZ would have probably have supported it too.