Hi,
I just uploaded a new polywavesynth archive with a revised directory structure which eliminates the need to place the polywavesynth folder in your PD path. Thanks to Frank for his solution. Now, (assuming you have the svf~ and mrpeach/osc externals installed) you can just load and go!
http://www.pkstonemusic.com/polyWaveSynth.html
or go directly to the download:
http://www.pkstonemusic.com/code/polywavesynth.tgz
Phil Stone pkstonemusic.com