Hi Mark,
Don’t tell me that I forgot to mention how to change and move the bones around.
Eek – I hope that isn’t the case.
When you add/create a new bone it will be created on all the currently visible layers.
If you duplicate a bone, it will be on the same layer(s) as the original
To move it to a different layer – just press M.
(shift clicking the pop up boxes will let you add it to multiple layers)
I hope that is what you mean.