and your complaining that its going to cost you £30
i'm not saying your wanting your console modding just to play pirate material, but if your original discs get scratched to smeg and back one replacement game would cost you between £20 -£30 anyway
They're not rocket science to do, but ensure you follow the instructions to the LETTER. The process is uber-important and if you don't manage to get a good EEPROM dump of your drive before you start, you can practically render the entire 360 useless.
Google for 'textbook guide 360' and you should find what you're looking for.