Modification du noyau et /boot/grub/menu.lst

Bonjour,
je viens d'installer le noyau 2.6.29.6 grâce à ce tuto...
http://www.informatique-inside.com/forum/s169-tuto-changer-noyau-sous-ubuntu.html
il est dit de ne pas oublier de modifier son /boot/grub/menu.list...
c'est quelque chose que je n'ai jamais fait j'ai donc peur de faire des bétises ..
si quelqu'un pouvait avoir la gentillesse de m'aider ce serait trés sympa ..
je colle ici la copie de mon /boot/grub/menu.lst actuel...(je précise que le noyau que je viens d'installer n'y figure pas ....)
# 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=fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859

## 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

## specify if running in Xen domU or have grub detect automatically
## update-grub will ignore non-xen kernels when running in domU and vice versa
## e.g. indomU=detect
## indomU=true
## indomU=false
# indomU=detect

## 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 9.04, kernel 2.6.28-14-generic
uuid fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859
kernel /boot/vmlinuz-2.6.28-14-generic root=UUID=fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859 ro quiet splash
initrd /boot/initrd.img-2.6.28-14-generic
quiet

title Ubuntu 9.04, kernel 2.6.28-14-generic (recovery mode)
uuid fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859
kernel /boot/vmlinuz-2.6.28-14-generic root=UUID=fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859 ro single
initrd /boot/initrd.img-2.6.28-14-generic

title Ubuntu 9.04, kernel 2.6.28-11-generic
uuid fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859 ro quiet splash
initrd /boot/initrd.img-2.6.28-11-generic
quiet

title Ubuntu 9.04, kernel 2.6.28-11-generic (recovery mode)
uuid fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859 ro single
initrd /boot/initrd.img-2.6.28-11-generic

title Ubuntu 9.04, memtest86+
uuid fbeed3ed-fcbf-47ed-8a3f-44b3a47e0859
kernel /boot/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/sda1
title Windows XP Professional x64 Edition
rootnoverify (hd0,0)
savedefault
makeactive
chainloader +1


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sdb1
title Windows XP Professional x64 Edition
rootnoverify (hd1,0)
savedefault
makeactive
map (hd0) (hd1)
map (hd1) (hd0)
chainloader +1


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, kernel 2.6.28-3-rt (on /dev/sdb3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.28-3-rt root=UUID=f07eb81e-ebae-4688-82ac-e7e36efa9aab ro quiet splash
initrd /boot/initrd.img-2.6.28-3-rt
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, kernel 2.6.28-3-rt (recovery mode) (on /dev/sdb3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.28-3-rt root=UUID=f07eb81e-ebae-4688-82ac-e7e36efa9aab ro single
initrd /boot/initrd.img-2.6.28-3-rt
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, kernel 2.6.24-24-rt (on /dev/sdb3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.24-24-rt root=UUID=f07eb81e-ebae-4688-82ac-e7e36efa9aab ro quiet splash
initrd /boot/initrd.img-2.6.24-24-rt
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, kernel 2.6.24-24-rt (recovery mode) (on /dev/sdb3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.24-24-rt root=UUID=f07eb81e-ebae-4688-82ac-e7e36efa9aab ro single
initrd /boot/initrd.img-2.6.24-24-rt
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, kernel 2.6.24-19-rt (on /dev/sdb3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.24-19-rt root=UUID=f07eb81e-ebae-4688-82ac-e7e36efa9aab ro quiet splash
initrd /boot/initrd.img-2.6.24-19-rt
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, kernel 2.6.24-19-rt (recovery mode) (on /dev/sdb3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.24-19-rt root=UUID=f07eb81e-ebae-4688-82ac-e7e36efa9aab ro single
initrd /boot/initrd.img-2.6.24-19-rt
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb3.
title Ubuntu 9.04, memtest86+ (on /dev/sdb3)
root (hd1,2)
kernel /boot/memtest86+.bin
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb4.
title Ubuntu 9.04, kernel 2.6.28-11-generic (on /dev/sdb4)
root (hd1,3)
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=e68012a4-3033-44ae-b713-ed80aa9c984c ro quiet splash
initrd /boot/initrd.img-2.6.28-11-generic
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb4.
title Ubuntu 9.04, kernel 2.6.28-11-generic (recovery mode) (on /dev/sdb4)
root (hd1,3)
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=e68012a4-3033-44ae-b713-ed80aa9c984c ro single
initrd /boot/initrd.img-2.6.28-11-generic
savedefault
boot


# This entry automatically added by the Debian installer for an existing
# linux installation on /dev/sdb4.
title Ubuntu 9.04, memtest86+ (on /dev/sdb4)
root (hd1,3)
kernel /boot/memtest86+.bin
savedefault
boot

et que l'installation d'Ubuntu ,lors du partitionement était declarée sur sda7 (je pense ici hd1...qui est un disque dur sata)
merci de votre aide.....