I am working on a new help file for PCStitch Pro. It isnt finished yet, but the section on docking panels is done. Try downloading the file at http://www.pcstitch.com/files/PCSPro.chm and read the part of docking and pinning the panels and let me know if it answers your questions.
Sorry, Mark! My Internet Explorer was not able to open the docking file. I think I have it figured out, though, after a few frustrating hours of playing with it. I'm looking forward to the finished help files.