Hey!  I got it to work!

I plugged the existing 2d diffuse image map node for the sky dome into the ambient color channel and ... Voila!

Thanks for pointing me in the right direction.

Now if I could just figure out how to get a screenshot into my post!

Klebnor der Grosse

Lotus 123 ~ S-Render ~ OS/2 WARP ~ IBM 8088 / 4.77 Mhz ~ Hercules Ultima graphics, Hitachi 10 MB HDD, 64K RAM, 12 in diagonal CRT Monitor (16 colors / 60 Hz refresh rate), 240 Watt PS, Dual 1.44 MB Floppies, 2 button mouse input device.  Beige horizontal case.  I don't display my unit.