Local printers (or network printers) will spool files to C:\Windows\System32\spool\Printers.
To capture files from a shared printer (if you look in Devices and Printers they will say 'Printer name on Machine name' - see Capture.png.
These printers will spool in the server directory e.g C:\Windows\System32\spool\SERVERS\MANGETOUT-POS1
To configure prism to look in this directory, there is a secondary 'spool' directory that will be looked in called `EpsonSpoolDirectory` in the Config.xml.