[QUOTE I am just trying to figure out how to get my PlanePlotter to receive other peoples data QUOTE]
Nick, unfortunately you have to pay the 25 Euros to be able to do that. The fee gives you access to the COAA server and the key to the front door. BTW if you are into ACARS you can use PlanePlotter to process your own ACARS data. What I didn't mention before, is that PP also works with AirNav's RadarBox as well as the Kinetic SBS box to process the ADS-B info.
There is a very active PlanePlotter forum that can be more than helpful if you want to know the finer details.
http://groups.yahoo.com/group/planeplotter/