I've made some of my little personal modifications for one of the most interesting factions in my opinion. I've changed the names to fit the historical margin(mostly) and also edited the c&p campaign description (no offense, it was just Denmark's campaign description with Sweden fit in the right spots).
Extract names.txt into your HRR mod folder into /data/text
Extract descr_names.txt into the HRR mod folder directly into /data/
Extract descr_strat into HRR mod folder into data/world/maps/imperial_campaign
And finally, extract campaign_descriptions into data/text again
If you have any troubles with this post in this thread or PM me. Thanks and enjoy!