Hi! My Macbook's Snow Leopard installation somehow crashed and now, it won't boot up on OS X, not even in safe mode. I can only get it to boot on Windows. How can I reinstall Snow Leopard using a USB? All the guides I've read says that I have to format the USB drive using Mac's Disk Utility. Since my Mac won't boot up, that's out of the question. Is there any other way to do this? I hope someone can help me out... Thanks a lot in advance!