BUt if you print to the pdf printer, this one does automaticaly the
creation of a file and directs it to a folder, on the other hand it
does indeed use postscript for the conversion, therefore AFAIK some
kind of postscript needs to be present in the system in order to make
it all work.
I would rather check if there is a way in your pdf creator programm to
set the defoult foulder somehow.