Problema ao instalar Ubuntu 8.10 num pc com dois discos rígidos

[Tetsuo]

Eu já tinha instalado o Ubuntu 7, mas em apenas um HD, pois decidi tirar o outro que eu tinha de 80 GB da Maxtor. Deu certo. Não teve aquele problema de só o XP entrar e ignorar o Linux. Mas aí a minha teimosia foi maior, porque a vontade de usar o Linux é grande. Decidi colocar o segundo HD de volta e tentar de novo. Não deu certo. Tem até uma opção durante a instalação do Ubuntu pra você escolher onde quer colocar o gerenciador de boot. Instalei agora a pouco o Ubuntu 8.10 e mudei essa parte de escolher onde colocar o gerenciador, mas não deu certo. O Windows ignora o linux e reina absoluto na inicialização. Já disseram aqui que tem que mexer no arquivo do Grub, mas não estou sabendo como editá-lo. Ou talvez esteja com medo de fazer bobagem e detonar o XP. Tenho dois Hds, o Sansung Sata 2 de 250 GB onde está o Windows e o Maxtor de 80 GB, onde se encontra o Ubuntu. Aqui estão as informações do grub:

## 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=72d1eae3-a042-40b9-ba2e-8db0e009e2c6 ro locale=pt_BR

## default grub root device
## e.g. groot=(hd0,0)
# groot=72d1eae3-a042-40b9-ba2e-8db0e009e2c6

## 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 2.6.27-7-generic
uuid      72d1eae3-a042-40b9-ba2e-8db0e009e2c6
kernel      /boot/vmlinuz-2.6.27-7-generic root=UUID=72d1eae3-a042-40b9-ba2e-8db0e009e2c6 ro locale=pt_BR quiet splash
initrd      /boot/initrd.img-2.6.27-7-generic
quiet

title      Ubuntu 8.10, kernel 2.6.27-7-generic (recovery mode)
uuid      72d1eae3-a042-40b9-ba2e-8db0e009e2c6
kernel      /boot/vmlinuz-2.6.27-7-generic root=UUID=72d1eae3-a042-40b9-ba2e-8db0e009e2c6 ro locale=pt_BR  single
initrd      /boot/initrd.img-2.6.27-7-generic

title      Ubuntu 8.10, memtest86+
uuid      72d1eae3-a042-40b9-ba2e-8db0e009e2c6
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/sdb1
title      Microsoft Windows XP Professional
root      (hd1,0)
savedefault
map      (hd0) (hd1)
map      (hd1) (hd0)
chainloader   +1


Alguém pode me ajudar? O que devo fazer?