The idea of having a disclaimer at time of downloading is something to consider although once downloaded .....
I wonder if disclaimer text entered in the Model Description of the Model info > File tab could somehow be used for a message. But that would, I guess, require SU9 to have process functions like "OnOpen" as a part of the file structure itself.
(Kind of funny, long ago, when I think back to using WordPerfect for DOS, I could associate OnOpen, OnSave, OnPrint, etc., script-functions to any of the menu items for a document or series of interrelated documents; I did this for an entire "electronic" operations and maintenance manual over 10 years ago.)