I have now PD 0.36 running, so basically the question is: how do I install PDP, GEM and PiDiP (are they so different? do they complement each other?) onto PD 0.36 (in panther thus)..
PDP/PiDiP and Gem don't depend on each others, you can install one or the other or both.
Gem is more dedicated to 3D and PDP/PiDiP to video processing.
but, Gem does some video processing too and PDP does 3D, i know, tricky....
to install PDP/PiDiP on OSX, you will need Fink, sorry, i don't know other ways of installing the requested packages on that system.
you can find PDP/PiDiP package and installation guidelines here: http://ydegoyon.free.fr/pidip.html
the support for OSX is quite new and not very well tested, so, be indulgent ( and patient ). it was first and mainly developped for Linux.
cheers, sevy