So you know how to load a door family but how about other things like wall styles or maybe text styles? Here's how:
1. Open an existing project (we'll call it project A) that contains the styles you want.
2. Open a the project that you want the styles imported into (project B).
3. While project B is open go to File-Transfer Project Standards...
4. A list will appear with all the styles that you want (from project A). Simply check the ones you want and press OK.