Hi Jay,
I can confirm that the DR5000 works with JMRI - it is what I am using, as well as a few of the digikeijs modules (feedback modules, servo modules and digital output modules).
If you want to have the DR5000 on your network, you will need to change the IP address of the DR5000 using a USB cable from your PC and the Digikeijs DR5000 application.? Once this is done you could connect the DR5000 to your network and have JMRI control it as per the info Peter provided.
Trevor
