This is how I create my floppy boot grub, exact copy of my grub hdd installation without the need of kanotix ( what I'm using ) boot image.

1) format the floppy : mke2fs /dev/fd0
2) mount the floppy : mount /dev/fd0 /mnt/auto/floppy
3) make directory : mkdirhier /mnt/auto/floppy/boot/grub
4) change dir to grub on hd : cd /boot/grub
5) copy files needed to boot grub : cp stage1 stage2 /mnt/auto/floppy/boot/grub
6) copy all files so that floppy grub is exactly the same as hd: cp *.* /mnt/auto/floppy/boot/grub
7) unmount floppy : umount /dev/fd0

to create bootable floppy:
a) Open grub interactive mode (grub>) : grub
grub> device (fd0) /dev/fd0
grub> root (fd0)
grub> setup (fd0)
grub> quit

You're done and now have a boot floppy with nice grub menu. This procedure is for people who are using grub to boot and want floppy as a backup incase their grun got corrupted.

In your case, which I beleived you didn't installed grub on your hd, then you need a little work. You can follow the above procedure but need some editing.
1) You need to edit menu.lst, something like this:
Example:

title Debian GNU/Linux, kernel
root (hd1,4) **Your linux partition
kernel /boot/vmlinuz root=/dev/hdb5 ro ramdisk_size=100000 lang=de apm=power-off hda=scsi hdb=scsi hdc=scsi hdd=scsi hde=scsi hdf=scsi hdg=scsi hdh=scsi nomce vga=791
savedefault
boot

title Debian GNU/Linux, kernel 2.6.6-kanotix-3
root (hd1,4)
kernel /boot/vmlinuz-2.6.6-kanotix-3 root=/dev/hdb5 ro ramdisk_size=100000 lang=de apm=power-off hda=scsi hdb=scsi hdc=scsi hdd=scsi hde=scsi hdf=scsi hdg=scsi hdh=scsi nomce vga=791
savedefault
boot

title Windows 2K/XP/2003 (hda1)
rootnoverify (hd0,0)
makeactive
chainloader +1
savedefault

title Windows 95/98/ME (hdd1)
rootnoverify (hd2,0)
makeactive
chainloader +1
savedefault

2) Edit your device.map, should have all your harddisk:
example:
(hd0) /dev/hda
(hd1) /dev/hdb
(hd2) /dev/hdd

3) Copy message from /boot/message from hd to /boot/message to floppy. Then edit floppy menu.lst to reflect where your message is.
Example:
# Pretty colours
color cyan/blue white/blue
gfxmenu (fd0)/boot/message

That's all to it. I hope this will work. Good luck