You need to send a pjl file to the printer. See the attached example as you just substitute the correct serial number. To send the file you need to first share the printer on the local machine. Then you use the net use command to assign a lpt port to the network printer using the following syntax:
net use lpt1: \\computername\sharename. Hit the enter key.
Next type
copy serial.txt (drag the serial files.txt) lpt1 and hit enter.
You sustitute the compuer name of your computer and the share name you gave the printer. Hope this helps.
(Note: Same as HP LJ P2015)