Admittedly I haven't fully read this thread, but if you want to list logged on users remotely, I have code on my web site.

http://mywebpages.comcast.net/habullock/kix_solutions.htm
http://mywebpages.comcast.net/habullock/Library/ListLoggedOnUsers2.kix
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Home page: http://www.kixhelp.com/hb/