@jean lemire said:

Hi folks.

Another possibility. Let's pretend that the file that you want to export the file is called A and that the file into which you want to place then is called B.
1 - Open file A.
2 - Save as C.
3 - Delete the model in the C file. All you want to keep are the scenes.
4 - Use File --> Import to import the model from file B. Place it where the previous model was. You may wait until this is done before deleting the model from A to keep a positioning point.
5 - Save as B, overwriting old file B with a new one that inherited all the scenes from A.

This idea worker perfectly! But I did a copy and paste in place. Saved a lot of time.