Hybrid span mode?

[foothead]

I am currently working on a project to potentially get a sudo- 8way crossfire configuration going. Anyway, I am curious how to get 'hybrid span mode' working in xp. Here's what I found on wikipedia:

[edit] Hybrid Span mode

This is a technique that allows you to use multiple GPUs to create one single unified display. This is a driver feature that allows you to overcome the 10 monitor limit in current Microsoft operating systems.

How do I enable this?! google turned up nothing.

thanks.