I figured this one out and figured it was a shame not to document it.
There is some stuff out there on this but not enough.
It appears that if you want to make a change and run a "script" it asks you to if you want to accept the
change Y / N. I have not find a way to get around that.
If you create a "change file" it assumes you know what you are doing and does not prompt you.
Example:
nsradmin -i mychange.txt
mychange.txt:
. type : NSR client;name:dcbc0212
update group: Servers
Life is good.