in reply to Changing Hash value in .pm file

Yes. There is a way. It's just text, there's always a way.

However, by the time you get that working flawlessly, a better, cheaper solution would have been in production already.

Have your stud_Info.pm load the hash from a Storable or some other serialisation method. Then it becomes trivial to update. And you can basically hide the code in this module and still provide the same interface to all callers.