Hallo!
PD and PDP were installed using apt-get install.
you can also install pidip with apt-get ... apt-get install pd-pidip
but you have to add some sources to /etc/apt/sources.list add e.g. these sources:
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# cinelerra deb http://www.kiberpipa.org/~minmax/cinelerra/builds/pentium4/ ./ deb-src http://www.kiberpipa.org/~minmax/cinelerra/builds/sid/ ./
# marillat deb ftp://ftp.nerim.net/debian-marillat/ sid main
# PDP-stuff: deb http://sindominio.net/~caedes/debian/ unstable main #deb ftp://ftp.nerim.net/debian-marillat/ unstable main
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then don't forget to run apt-get update ;)
LG Georg