An interesting offshoot of the method that I described at this link is that when you save the In-Place family as an RFA, it adopts the Category that it had AS an In-Place Family!!
In simple terms:
- Make an in-place Wall family with some geometry in it.
- Save it as an RFA
- Load the RFA into your project
- It is a Component family with the Category set to Walls!
Have a great weekend everyone!