našel jsem toto:
Plop - Documentation / Manual / Examples - Free Boot Manager, builtin usb driver, native usb, boot different operating systems, cdrom, usb, freeware, option rom bios
http://www.plop.at/en/bootmanager/intro.html
šlo by použít?
na následující stránce návodu píší:
The boot manager will be installed as primary boot manager to your hard disk. No extra partition and required. The boot manager will be in the first sectors of your hard disk before the first partition begins. The boot manager starts even when no operating system exists.
to by mohlo být právě to, co potřebuju (?)