Modify multiple material parameter in differente .max scene files


I've created a lot of .max scene files.
Each .max file contain the same Standard Material.

What I'd liket to do is to change "Specular Level" and "Glossiness" parameter of each material avoiding to open all the files one by one.

Is there maybe a way to make each material to point towards a single file containing the parameter to change, in the way that modifying this single file I can obtein the change on all the others.

Thank you.