1) Install netpbm, JBIG-KIT tools, imagemagick, inotify-tools (optional)

2) Copy pstoricohddst-gdi to cups' filters directory (usually
   /usr/lib/cups/filter). 

3) Make sure it is executable by lp user and owned by root:root (i.e.
   chown root:root pstoricohddst-gdi) 

4) Add printer through CUPS' web interface (usually
   http://localhost:631/), click 'Choose file' and select provided PPD-file

5) Print!