Dual Display questions for ATI hardware

I recently installed the Catalyst 3.6 drivers/control panel and Hydravision 3.21 (since I could not find what I was looking for in 3.5) and have been stumped on how to accomplish what I think should be a simple thing. I can easily accomplish this on a NVidia based dual display setup, but not my ATI based one.

I want to be able to have either one 3200x1200 wallpaper that spans across both displays OR two different 1600x1200 wallpapers.

As I said, this is easy enough with nView, but using ATI's tools I can't figure it out. Has anyone found a (secret?) tab, radio button, widget that shows these options? I'm new to using Catalyst drivers so if anyone knows how to do this I'd be much obliged.

Thanks in advance!

LNCPapa