you can change the names.. i'm pretty sure they are from retroarch team.. but the file extension works, there is a 42 char limit, and no special characters..
plus there is a minor glitch where you cant use double codes, meaning codes that have "code1"+"code2"..
you would have to manually make 2 seperate codes, and activate them together..
but you can name the cheat files anything you want.. they are individually selected when you load them, they dont load with the rom..