Well, I got it working. And it works for power-on too, although I suspect that is because my display is newer (2009 model)? I must be configuring hyperterminal wrong because when I use this plugin to a tool called "Eventghost", it worked perfect. Thank you, Fiasco!

Go here to download the eventghost plugin:
[Link: eventghost.org]

Go here to buy your cable, if you don't want to make it (p/n 6049):
[Link: dcables.net]