I found the following page useful, and have set up a floppy to boot any of the distros on my system, including XP - without the floppy, XP starts as normal.

You seem to be into Grub already, and the following should help you make menu.lst on the floppy.

http://www.linuxarkivet.nu/howto/Mul...-GRUB/x18.html

Detailed information can be found in Grub Manual at http://www.gnu.org/software/grub/manual/grub.html

Best of luck