You don't need to use any special boot programs if you are not
comfortable with the process of using a boot loader and modifying the
computer's master boot record. Instead, all you need is to boot
GNU/Linux from a boot floopy that will be created when you install
GNU/Linux. You simply insert the floppy whenever you boot your
computer into GNU/Linux and make sure it is not inserted if you want
to boot into the original operating system. Booting from floppy is a
little slower than booting from hard disk but otherwise functionally
equivalent.