There's a whole KB on it, 8168, which I remember using back in the day.
Parameters attached to the Rich Client URL allow control over the middle tier machine and system as well as the state of the system when it opens.
The format of the URL is as follows:
"http://[Server]/ePower/rdaui.htm?[SystemName]&http://[Server]&[parameter1=value1]&[parameter2=value2]& ..."
I assume you can get to the KB, if not, I'll send you the article