(Note: this is only related to the UK version of BeOS 5 Pro from KochMedia.)
In some cases, Epson printers will not print in BeOS 5 Pro, saying that the release of the Epson driver is not compatible with your version of the EPSON Driver.
The drivers that are included in the Personal Edition work, so install PE and zip up the drivers located in /boot/beos/system/add-ons/Epson and /boot/beos/system/add-ons/Print . Now uninstall PE and unzip the files back to the above locations on your PRO partition.