So I found the section in the manual relative to Su-4. Nothing tells me how to set it. Just tells me to set it. I suppose if I actually read the whole thing I might have figured out how to get into settings.
But I just found an article on the net...a basic review of the SB-900 that says push and hold the OK button. Shazaam! There the setting is. I got it into SU-4 mode, put the camera in manual...turned flash to manual...walla! The SB-900 fired off. Of course it completely burned out the picture. But as noted above...a little trial and error and I got a nice picture of my TV right as the Colts missed there final attemp at a touchdown. Missed the whole game while I was trying to figure this thing out.
Thanks for all the help guys. I still think I am going to get a commander for this setup though. But for now I can say I understand how it all works. Yeah!