Has anyone done a stereo material/display setup?

Hi,

I’m looking for a how-to for setting up a material/rendering method for rendering a screen or video in stereo 3d to a vr headset.
I found a doc manual but that is doing a spherical latlong lookup and creates a sort of window looking into that sphere.

I want to get just a plain flat screen with a left/right image being piped into the left/right eye of a VR headset.

Has anyone done this or know about a tute somewhere?

Cheers

EDIT:

I just found it sorry should have googled a bit longer before asking.
This is it: