How do i save walls back to the library?

We are trying to have our walls come in with a hatch, but not the full wall. we want to show studs/wall build.

I modified the 2D Plan View instructions, copying the original DRAWPOLYLINE, and adding/subtracting .75 from the points, and having the DRAWHATCH reference that shape instead.

That was easy.

When i go to save back to the library, there is no option for that in the Modify>Room Components.

I tried using the product tab's Save Product to Library, but when the window pops up there is no selection for Room Components or Walls.

Ive made a few other formula based changes that i would love to just save from the project i have them in, instead of keeping track of the changes and transfering them somewhere else.

So in short, how do i save changes to walls back to the library?