When TeX and Ghostscript are in the right place, you finish the installation by unpacking the PP3 ZIP file and copying its content in the proper directories:
pp3.exe
to an arbitrary directory that is in your
PATH
.
PP3DATA
to this directory.
For the sake of simplicity, I recommend to copy everything to
C:\Programs\pp3
and to set your PATH
environment variable
to
old PATH
;C:\Programs\pp3
and to set the PP3DATA
environment variable to
C:\Programs\pp3
. That's it.