Render Maps in XSI v2?

I have been working on an animation project. It takes so much time to render the same static background. I created passes in order to overcome this problem. I want to use render maps as environment for passes (foreground objects should reflect bgr). How can I do it with XSI v2

Thanx in advance

if you want make an environement reflection map, put a 100% reflective sphere in the center of your scene
and make a rendermap,then you can use the renered map as an environement map