🚀 go-pugleaf

I'm trying to provide context sensitive help using pdf.  I can get the
pdf to open at the correct nameddestination with a url like this:
http://server.com/file.pdf#nameddest=dest&pagemode=bookmarks&zoom=100&toolbar=0
However, I run into two problems after the pdf is open.
Problem 1:
After I open the help once and then try to go to another destination,
the Reader parameters
('#nameddest=dest&pagemode=bookmarks&zoom=100&toolbar=0') are just
appended to the end of the first url and the pdf doesn't move to the
new nameddestination.
Problem 2:
If I open the pdf help window, close it, and then try to open it again
in the same browser session, it opens a new window but doesn't load
anything and locks up both browser windows.

Has anybody tried to do this and have better luck than I have?  Any
pointers or suggestions would be greatly appreciated.  Thanks in
advance.
Josh.