I'm not sure how to do it realtime, however the video player that comes with the 3D Vision kit is supposed to be able to do Side by Side video.
http://www.nvidia.com/object/product...ionKit_us.html (under specificiations tab):
- Monoscopic
- Interlaced (Field-Sequential)
- Side by Side
- Over/Under
- Multi-View (Tiled)
- Sensio
- SIS Attachment
Hopefully someone else will know how to get realtime formats displayed on this TV.