Composite + Xinerama - Anyone got it working yet?

I remember reading a while back, once the xorg-server package was updated past 10, the incompatibility between composite and xinerama extensions were worked out and those who use multiple video cards via Xinerama can once again take advantage of some of the cool Composite features.

Thus far, I haven’t been able to make it work and didn’t really see anything out there showing how to get it to work just yet. Perhaps someone else has found a how-to or something that can point me in the right direction?

Thanks for the help!
T