Update INFO.md

[UDb23]

Edited to add specifications about:

• creator
• multiple different overlays for same game
• Generic overlays cfg

[meleu]

thanks!

I just removed the Option 1 instructions, but will add when I implement.

And the generic overlays do not need to have a specific name, any name is valid. ;-)

Will write something more precise next week.

Thanks again!

Cheers!