The invention provides tools and techniques for running pre-boot code on a computer from a file stored in a file system on the computer. The pre-boot code may include an operating system which is not otherwise installed on the system. For instance, the pre-boot code may be used to boot a DOS operating...http://www.google.de/patents/US6996706?utm_source=gb-gplus-sharePatent US6996706 - Booting an operating system or running other pre-boot code from a file stored under a different operating system
