[janbar]

Also since few days ago i pushed a change in background , allowing user to create his own map for EIT categories. I wanted this feature long time ago and finally i made it.
With that you can add more words or sentences matching with category codes, avoiding to update field "category" of your myth database. Here i use xmltv and all categories are translated with french language, so the matching cannot be done and no colors in the epg screen.
To make it: copy the original file "pvr.mythtv/resources/eit_categories.txt" from the addons folder to your user folder of the addon: ".xbmc/userdata/addon_data/pvr.mythtv/", then edit it to match category codes with your mythtv category strings:

0x10;"Film"
0x20;"Nouvelles"
0x20;"journal"
...

You can add more than one "meaning" per category code:

0x10;"Film"
0x10;"Cinéma"
...

Remove unmodified matching or unused, so keep only rows with change or new, because addon will continue to use the original file and then it is not necessary to have double.

Finally restart the addon to take account the user file. Now addon will match custom category and you will able to see colors in epg.