It doesn't matter if it's cheating, I mean you aren't playing with other people are you? The problem with cheating in a singleplayer game is that it could ruin the experience for the person who's playing it. If I depended too much on my Action Replay the game would stop being fun, which ruins the experience for me. But if it's not ruining your experience or anyone else's, it doesn't matter if it's cheating, do it as much as you want. But if you feel guilty you should probably stop because that means it's having a negative effect on the amount of fun you're having playing the game.