How to use one mc as container for more using

I update one of my old Flash site and tink about how to use one mc for multiple using.

In attached FLA is very simple example.
I used this mc many times and changed at that time manually on last frame every time the content of my 2 text fields.
It was very impractical. :red:

Now I think about how to use those same mc if I need every time change only the value of my text fields.
I load variables and now I need only change the content of the text fields if the user clicks different menu btn.

Sure exist any practical progress how to make it.

Thank you.