Iray Worlds SUPERPAK

I now have added Iray World Superpak to the SkyDome and although I have a lot more I am still confused about how to use a great portion of them.
I can use the scenes but I am having an impossible time figuring out how to use the MATS, The Spin Worlds or Spin Skys, etc.
I guess I should use the other Custom Help to get a handle on this.
Comments
I don't have it but...
The MATS will probably be used in the Surface Tab to change the appearance.
The Spin Worlds will move the whole world round in increments, much like spinning the camera, but it stays still, or the dome.
The Spin Skys will do the same to the skys but leaving the ground where it is and only turning the sky.
You're right Fishtales.
IR base scene tab : select IR base (surface tab) for the ground or the water and IR horizons for the horizon mat mor.
IR skydome for the sky
These screen captures may be helpful :
the screne tab :
the surface pane :
Thank You Both.