After installing it then just load it and select your sky from the pose files, you can also use any tilable sky textures you may have. Two issues I have found to watch for: 1- don't place anything too close the the dome (you may have to increase it's size depending on your scene) else it can catch shadows. 2- if using a water plane with high reflections then the sky texture may reflect on your water. This can be a good thing or a bad thing depending on the effect(s) your after.