Simple grub can 'see' partition; full grub can't

[dsmithhfx]

Hi,

I recently installed Zenwalk 5.2 to a multiboot pc with NTFS, FAT32, ext3
and swap partitions on an 80G ide drive. I did not install lilo (or any
bootloader) for zenwalk, because I plan to install at least a couple more
OS's (including W2K) before working out a booting strategy. In the meantime,
I planned to boot from floppy using GRUB.

With a simple GRUB floppy (stage 1 & 2, no menu.lst), this has not been an
issue. I simply key in:

root (hd1,6)
kernel /boot/vmlinuz root=/dev/sdb7
boot

...and it boots up zenwalk no problem.

However, when I attempt to boot from a full GRUB floppy, with the same entry
in the menu.lst, GRUB complains that there is not a valid file system on the
partition. In fact, when I type in:

null (hd1,6)/ [tab]

from the prompt, I get the same complaint. I am able to 'see' the other
partitions on the drive using this method (including sdb8, an empty ext3
right after to sdb7), just not the one zenwalk is installed to.

I don't mind booting from the command line but I need something a little
more elegant for another user who is new to linux (and cli in general).
Also, eventually I would like to eventually install GRUB to hdd, and boot
from the MBR, and I'm a little concerned about this. 

Incidentally I have experienced the same issue on another pc, where I can
boot ubuntu gutsy and fedora 8 from a full-grub-on-floppy menu.lst entries,
but not opensuse: grub can't recognize the particular partition.
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