Revision 543 - 2006-02-15:
Added: Default string loading for mods that lacks those strings.
Added: DoNotImportDefaults? flag to prevent default string loading in updated mods.

Test report: Default string loading includes all string files except The Great Library (great_library.txt). It does work for gl_str.txt though!

Question: Where should the DoNotImportDefaults? flag be placed?
Probable answer: As it sits at the beginning of Strings.txt in the default folder, it would have it's logical place at the beginning of scen_str.txt in the scenario folder.