First, if you don't know what this is about you can use THIS SEARCH to see all the posts I've made about it already.
Second, I recorded a VIDEO to explain how.
Third, you can watch or at least listen below to see how to get the content in your project or template:
I used Revit Architecture 2009 to record the video because that was the file version that I happened choose. I probably should have done it with 2010 but the concepts are the same.
Fourth, I've added another video to demo how to use them, as requested.
Last, seasoned users know that there are other ways to get the content in the project too as well as using them in the project. I just showed one, pretty simple, way to get where you want to go.