You need to find out if it supports quad-buffered stereo. Otherwise, you can use passive stereo as opposed to active stereo. In the cosm download, there's an example using passive stereo, which will work on any hardware.
sorry. I thought this was already in the download, but apparently not. Here's a passive stereo example. You're right that there's only stereo 1/0. That's for active stereo. Passive stereo requires a totally different patching structure: