error 15 :file not found on booting suse linux 10

[vijay2009]

error 15 :file not found on booting suse linux 10
we used suse linux 10 and ubuntu 8.04 in our computer.

in suse linux,we update online updates.then it asks to reboot.after rebooting into the suse linux it shows error 15:file not found.press any key to continue.
then we go to use ubuntu 8.04 kernel 2.6.24-16, in that also when using add or remove program
or synaptic package manager or updating online it shows an error message E:dpkg was interrupted.you must manually run "dpkg--configure -a"to correct the problem. E:_cache-->open()failed,please report.
then we manually corrct the problem and after rebooting it shows the four versions of ubuntu 8.04.1 kernel 2.6.24-22
ubuntu 8.04.1 kernel 2.6.24-21
ubuntu 8.04.1 kernel 2.6.24-19
ubuntu 8.04.1 kernel 2.6.24-16
and suse linux 10 os is not seen.
then in ubuntu, after online updates the ubuntu is ubuntu 8.04.3 LTS kernel 2.6.24-24 (with the help of ubuntu launchpad , we make changes in the menu.lst and we also solved the problem "unable to resolve host". thanks to launchpad.)

now our menu.lst in ubuntu follows

# 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 (hd0,5)
# 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=232d9e4c-48f8-474d-83c5-a559530a9679 ro

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

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,6)

## 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 access=v3

## 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

howmany=2
color cyan/blue white/blue

## ## End Default Options ##

title Ubuntu 8.04.3 LTS, kernel 2.6.24-24-generic
root (hd0,6)
kernel /boot/vmlinuz-2.6.24-24-generic root=UUID=232d9e4c-48f8-474d-83c5-a559530a9679 ro quiet splash access=v3
initrd /boot/initrd.img-2.6.24-24-generic
quiet

title Ubuntu 8.04.3 LTS, kernel 2.6.24-24-generic (recovery mode)
root (hd0,6)
kernel /boot/vmlinuz-2.6.24-24-generic root=UUID=232d9e4c-48f8-474d-83c5-a559530a9679 ro single
initrd /boot/initrd.img-2.6.24-24-generic

title Ubuntu 8.04.3 LTS, memtest86+
root (hd0,6)
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

how can i get into suse linux os.?please help. i am new to computer and linux .