Holding <Ctrl><Shift><C> on a "parent" node will give you a confirmation "ding" (Windows error sound). That will copy all nodes below it. When you then "paste" it into another file, it will add them all. You just have to be careful where you add them. I've got a double-screen set-up on my computer, and will open two files side-by-side to make comparisons. To do that, use the first instance of S3D you have open, and use the "File" menu item, then "Open", and point it at the 2nd file you want to use. Perhaps someone knows of a less labor-intensive method... ??
