I'm making a mod that changes Breezehome. I understand that there is a navmesh problem with Hearthfire so I would need a separate version of the mod that is Hearthfire compatible?

What do I need to do to make the creationkit work with Dragonborn enabled? I've seen a problem with enabling Dragonborn then entering my mod's cell in the game with netches in the ceiling. I assume I will need to make some change in my mod with Dragonborn checked to fix that but I understand the creation kit will crash if Dragonborn is checked.

Dawnfire doesn't seem to have any problems.

Any advice about DLC's and modding will be hwlpful.