I have a sb 900 and 4 sb r200s
I have one of these
http://www.europe-nikon.com/en_GB/product/speedlights/commander-kit-r1c1
With 2 extra sb r200's
The sb r200 is pretty much useless without a trigger ... It has no hotshoe, just a channel and group selector
You set the trigger (in this case the sb900) to the same channel then dial in their power per group. There are 3 groups, a, b and c so you can have up to three different levels of power. They can be set to TTL and have +/- 3 stops of comp. Auto, which I don't use and don't know what it does ... Or just set them manually between 1/1 and 1/128th power with 1/3 fractions of power between each setting. Using the sb900, you can also set it separately within the same parameters!
Nikon's CLS is very comprehensive really ...
I managed to pick up the kit I have (excluding the sb900) for £400 s/h ... I didn't need it at the time, but it's proved very useful once in a while!
I also have my old sb600 to chuck into the mix should I need to ... Pretty ott flash set up really
As far as this shot is concerned, I think it's a work in progress, there is too much reflection off the near edge and bottom of the ring, but that could be solved by diffusing the light from the 900 a bit better! I wanted something a little different to show her to see what she thinks. I think this is a little more "contemporary" compared to the more traditional stuff she has already ... It's also not perfect which is a good place to start I think
Should really sy this sort of thing on an open forum should I ...