How to setup DVR to read your own EPG Data

I have an xmltv.xml file that I would like to use with Plex and HRHomerun. I cannot find any information anywhere on how to setup Plex to use that xmltv file instead of the default Plex Program guide. My DVR is working fine, just need to change the program guide.

Any help is appreciated.

You specify the XML file when doing the initial DVR setup. Delete the DVR and set it up again if you want to use your own XML provider. Recordings should still exist when DVR is setup again.