ubuntu 10.04 upgrade error

[debian]

Hi admin

My present OS is Karmic . I've installed Lucid as separate OS and since
i cant live without the existing installation.

Please tell me how to upgrade to ubuntu10.04 from 9.10.

I need all my existing customizations, installed apps, documents...
And like...

I've an ISO image and a bootable pen drive of Lucid Lynux. (my faulty
DVD drive does not work with CDs) and i dont have a broad band
connection.

[admin]

Use this method if the system being upgraded is not connected to the
Internet.

1. If the ISO file is on the computer to be upgraded, you could avoid
wasting a CD by mounting the ISO as a drive with a      command like:
         sudo mount -o loop ~/Desktop/ubuntu-10.04-alternate-
i386.iso /media/cdrom0

2. A dialog will be displayed offering you the opportunity to upgrade
using that CD.

3. Follow the on-screen instructions.
   If the upgrade dialog is not displayed for any reason, you may
also run the following command using Alt+F2:
   gksu "sh /cdrom/cdromupgrade"

  Or in Kubuntu run the following command using Alt+F2:
     kdesudo "sh /cdrom/cdromupgrade"