Ubuntu, grub, error 17

[DMC1988]

Salve,
ho appena installato una versione di ubuntu sul mio hard disk esterno,
ma al riavvio del pc mi trovo "grub, please wait,..... error 17".

Ho provato a cercare alcune soluzioni su internet ma non sono
riuscito a risolvere il problema,....

Il problema mi sembra riguardi la collocazione delle partizioni,
ma essando la mia prima versione di linux fatico a capire come devo fare,....

Vi prego, fate finta di doverlo spiegare a vostra nonna!!!

intanto posto il menu.lst che pare essere il nocciolo della questione,....

# 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=c15fe18b-9861-42cc-9447-205bcbb3ace6 ro

## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd1,2)

## 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

## ## End Default Options ##

title		Ubuntu, kernel 2.6.20-15-generic
root		(hd1,2)
kernel		/boot/vmlinuz-2.6.20-15-generic root=UUID=c15fe18b-9861-42cc-9447-205bcbb3ace6 ro quiet splash
initrd		/boot/initrd.img-2.6.20-15-generic
quiet
savedefault

title		Ubuntu, kernel 2.6.20-15-generic (recovery mode)
root		(hd1,2)
kernel		/boot/vmlinuz-2.6.20-15-generic root=UUID=c15fe18b-9861-42cc-9447-205bcbb3ace6 ro single
initrd		/boot/initrd.img-2.6.20-15-generic

title		Ubuntu, memtest86+
root		(hd1,2)
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 NT/2000/XP
root		(hd0,0)
savedefault
makeactive
chainloader	+1


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

a proposito,.... alcuni avevano proposto di modificare il file "menu.lst", ma da me pare impossibile.
Grazie mille per tutte le risposte!

[DMC1988]

Risolto!
alla fine ho preferito installare tutto direttamente sul pc,....
come si dice???
chi fa da se,.... non ha una donna!

[farronait]

cavolo ho lo stesso problema.

puoi dirmi come hai fatto_ grazie e ciao