Hallo!
Yes, would be nice - someone would have to integrate them to pd-extended (using [import] and etc.) ...
Everyone could integreate them to her/his own pd-extended using a simple "-path flatspace", as AFAIK everything netpd uses is already there and people not using pd-extended wouldn't have tons of "import: couldn't create" error messages.
No, zexy and iemlib is not in flatspace ...
LG Georg