Have a look at this page for some info:
http://www.mastincrosbie.com/mark/linux-ob6k/win2k.html
IMO though it will be easier to use the boot loader provided by your Linux distro. This will either be LILO, which is the easiest to set up, or Grub, which is a little more complicated but more powerful. If you are using one of the more user-friendly distros like Suse or Fedora you needn't worry about the setup as the installer will do it all for you.