I did understand your questions here but I missed "1 Print Server (Machine Model: DN-13007 Firmware Version: 2.28)" important here. Yes you can run both pc`s to share the scanner both: scan and print function, however you dont use the usb cable to achieve this, this is done through software.
Go here and read through to setup your print server up correctly:
http://www2.produktinfo.conrad.com/d...BKONVERTER.pdf
Note: I have read through this manual and it explains how to achieve what you
are trying to do here, which I found interesting by the way.