The following are documentation links that I have found researching (I have spent an entire day and a half on this problem) that are good and get me most of the way there:
http://www.eclipse.org/pdt/documents/XDebugGuide.pdf
http://nalakajayasena.wordpress.com/2007/12/07/debugging-php-with-pdt-and-xdebug/
I have started debugging sessions due to these steps.
However, whenever I start a new debugging session, none of the variables are visible, all of my break points are ignored, and I am unable to step into code. But, when I stop the debugging session, it lets me know that it has ended - in other words, it was indeed started, just no variables or break points.
I would be happy to use either of these debuggers, if I could just get them to work. I seem to be getting closest to what I need with XDebug, but I am still not there. Does anyone have an idea what is wrong or what else I can do?