Rename .unitypackages?

Is it alright to rename .unitypackages?

example:
C:\Program Files (x86)\Unity\Editor\Standard Packages

Eighteen Free Substances.unitypackage

re-name to:
Substance_01_18.unitypackage

As long as they are in that folder, every time you create a new project, you will see them. If you are trying to import them yourself, a name doesn’t matter. Its like changing the name of a Word document.