Yes, it is wrong to edit tiles in someone else's hack. It is wrong to edit anything in someone else's hack; you just don't do it. Even if you only planned on editing tiles, you can't. So please:
1. Remove the download link from your user title.
2. Remove the image-links in your signature.
3. Stop editing Liquid Crystal's graphics.
That's all you have to do. Otherwise you'll be in trouble for stealing the hack, and I don't want to have to punish you for that.