Default save on MSO format

Hi, I would to modify the msi file of LO 3.5 and associate the default save on MSO format. Someone can help me? Thank you

What for to modify msi file? It could be made in Settings. Set up MSO file formats as default for Writer and Calc. If you need Software deployment GPO then see There you can find description of msi modification

May I ask why you want to use MSO as a default format?

Tools - Options - Load/Save - General. In the bottom you see:
Document type - text document, spreadsheet, …
Always save as - select MS Word … or MS Excel…

The solution doesn’t work. Have you another solution to try? Thanks!
I want to use a MSO default format

Basically a dupe of: Set load/save defaults via MSI