Windows VistaとUbuntu8.10とFedora11のマルチブートにしようとおもい
10回近くFedoraとUbuntuのインストールを色々な条件で試してみましたが
UbuntuがFedora11をインポートしてくれずマルチブートが難しい状態です。
それでFedoraのgrub/menu.lstの設定を一部Ubuntuのgrub/menu.lst
に追記して起動させようとしたんですが駄目でした。何か良い方法はあるでしょうか？


Ubuntu8.10の/boot/grub/menu.lstは


# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=39f1a475-64b5-4826-96be-b782b2465651 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=4a2a1063-d107-4c00-acc9-126d07a5cc07

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Ubuntu 8.10, kernel 2.6.27-9-generic
uuid 4a2a1063-d107-4c00-acc9-126d07a5cc07
kernel /vmlinuz-2.6.27-9-generic root=UUID=39f1a475-64b5-4826-96be-b782b2465651 ro quiet splash
initrd /initrd.img-2.6.27-9-generic
quiet

title Ubuntu 8.10, kernel 2.6.27-9-generic (recovery mode)
uuid 4a2a1063-d107-4c00-acc9-126d07a5cc07
kernel /vmlinuz-2.6.27-9-generic root=UUID=39f1a475-64b5-4826-96be-b782b2465651 ro single
initrd /initrd.img-2.6.27-9-generic

title Ubuntu 8.10, kernel 2.6.27-7-generic
uuid 4a2a1063-d107-4c00-acc9-126d07a5cc07
kernel /vmlinuz-2.6.27-7-generic root=UUID=39f1a475-64b5-4826-96be-b782b2465651 ro quiet splash
initrd /initrd.img-2.6.27-7-generic
quiet

title Ubuntu 8.10, kernel 2.6.27-7-generic (recovery mode)
uuid 4a2a1063-d107-4c00-acc9-126d07a5cc07
kernel /vmlinuz-2.6.27-7-generic root=UUID=39f1a475-64b5-4826-96be-b782b2465651 ro single
initrd /initrd.img-2.6.27-7-generic

title Ubuntu 8.10, memtest86+
uuid 4a2a1063-d107-4c00-acc9-126d07a5cc07
kernel /memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda2
title Windows Vista/Longhorn (loader)
root (hd0,1)
savedefault
makeactive
chainloader +1


# This entry automatically added by the Debian installer for a other-linux OS
# on /dev/sdc3
title Fedora (2.6.29.4-167.fc11.i686.PAE) (sdc3)
root (hd1,1)
kernel /vmlinuz-2.6.29.4-167.fc11.i686.PAE ro root=UUID=3d0e5742-0631-4b13-9da4-404c758cafda rhgb quiet
initrd /initrd-2.6.29.4-167.fc11.i686.PAE.img
savedefault
makeactive
chainloader +1




ファイル構成は
root@hiroppy-laptop:~# df -a
Filesystem 1K-ブロック 使用 使用可 使用% マウント位置
/dev/sda3 14555424 6361224 7454812 47% /
tmpfs 1031600 0 1031600 0% /lib/init/rw
/proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
varrun 1031600 196 1031404 1% /var/run
varlock 1031600 0 1031600 0% /var/lock
udev 1031600 2860 1028740 1% /dev
tmpfs 1031600 452 1031148 1% /dev/shm
devpts 0 0 0 - /dev/pts
fusectl 0 0 0 - /sys/fs/fuse/connections
/dev/sda5 186663 32820 144206 19% /boot
securityfs 0 0 0 - /sys/kernel/security
binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc
gvfs-fuse-daemon 0 0 0 - /root/.gvfs
/dev/sdb5 7321252 172032 6777320 3% /media/disk
/dev/sdb2 194449 13738 170671 8% /media/disk-1
/dev/sdb1 563199996 50416324 512783672 9% /media/USBハードディスク０１
root@hiroppy-laptop:~#

です。Fedora11のファイルシステムをext4にしてから一部Ubuntu側でFedoraのファイルが認識できなくなっています。
Fedora１１をUSB外付けハードディスクにインストールしました。
どうすればUbuntuのgrubでFedora11を起動出きるようになるでしょうか？