GtkPSproc
All the instructions are available in HTML format in the directory
docs/index.html
and, after installing, in
/usr/share/doc/gtkpsproc/html/index.html
There you will find how to install GtkPSproc. But as a fast instructions:
make install-printer
will do the job (but read the instructions in order to know how to launch the GtkPSproc daemon, needed to use it directly from CUPS).
Enjoy it!