Problem upgrading an offline computer

[Mariano Jara]

On Tue, 2011-02-08 at 18:37 -0300, Mariano Jara wrote: 
> On Wed, 2011-02-09 at 05:12 +0800, Goh Lip wrote: 
> > On Wed, 09 Feb 2011 04:43:27 +0800, Mariano Jara <marianojara at afip.gov.ar>  
> > wrote:
> > 
> <snip>
> 
> > > 'Upgrading Using the Alternate CD/DVD
> > >
> > > Use this method if the system being upgraded is not connected to the
> > > Internet.
> > .
> > .
> > > Any help or pointers are greatly appreciated. Cheers,
> > >
> > 
> > You may want to see this..
> > https://answers.launchpad.net/ubuntu/+source/ubiquity/+question/109413
> > 
> > 
> > Regards - Goh Lip
> > 
<snip>

I tried to follow the above link's instructions (not sure if I did it
right though), but I keep getting the same error message:

"Could not determine the upgrade..."

Here's what I did:

I run Synaptic and went to Settings -> Repositories and unchecked
everything on Ubuntu Software tab, Updates tab and deleted all entries
in Other Software tab (most of them were Jaunty and Karmic). Then
reloaded and exit Synaptic.

I'm not quite sure what the Update Manager's list is.

I also went to /etc/apt/ and /etc/apt/sources.list.d/ and checked
various sources.* files in there but they were all commented out. So I'm
clueless (again).

-- 
Mariano