Is it possible to rename a game/description?

[Nomzr]

I tried editing the details under the "Info" tab under "Properties" of a game, and I couldn't change anything. I opened the config to find nothing, so... I think this may be more complex that I had first thought. I only wish to do so because I have a separate ISO for Project M, and Dolphin can't tell the difference, they both show the same banner, description, etc. It'd just be more convenient. For that matter, I here you can also customize banners? Is this a hard thing to do?