Plop Boot Manager (PBM) allows you to access a booting menu independent of your hardware from a CD or floppy. This program is simple (old school fun) and intuitive. It allows you to boot on a device on your computer, when the options in your bios do not allow it (short settings, password protection of the bios, etc.) or that you can only boot to a CD or floppy but you want to boot to a USB key or external hard drive.