The green lines are normal. I get them when booting discs through disc loaders. If it didn't work for you, why don't you try putting them in a 'games' folder and see if that was the problem? If you intentionally don't follow a step of a guide and get errors, then it's clear what you need to do first before asking for help.
I don't know if having them out of the 'games' folder will actually be detrimental to play, but you'll be the perfect example if it works when you put it in that folder.