Hi. As the title says, I have a problem with a wall hole. It's actually relatively big; about 12 cm by 6 cm. Here's a photo I took: http://i.imgur.com/dh9IK.jpg I would like to repair this hole. I understand that it involes drywall compound, possibly gypsum panel. But that's as far as I know. I'm totally unfamiliar with this, so I would really appreciate if someone can help me out on this. Thanks.