Ok, done.
Thanks Ivan for your help. Your comments make me go ahead a bit and I found a way to fix this issue without you have to design an entire new scn file.
1. Rename map and org and image files with new names with map and OOB editors.
2. Open Scn Editor and create the new scn file.
Do not include anything inside the scn file.
Just save with the new name and close editor.
3. Open the old scn file with wordpad text editor from your Windows OS and minimize in the toolbar.
4. Open the new scn file with wordpad again in other windows.
5. Go to the old scn file in the wordpad and do
Select all text and
Copy from tool menu and minimize
6. Go to the new file scn in the wordpad. Select all and Paste from tool menu, and save the file.
7. Close both files. and Voilá.
In order to avoid later confusions, delete or move to other place the old scn files.
Thanks.
Chema