On Mon, Sep 19, 2011 at 8:32 PM, Bruno Wolff III <bruno@wolff.to> wrote:

On Mon, Sep 19, 2011 at 20:15:07 +0530,
Danishka Navin <danishka@gmail.com> wrote:
> Hi,
>
> I want to create a desktop launcher for a specific application which is
> already in the menu.
> How to do this while building the ISO file.

Take a look at the qa-testday spin for at least one way to do this.
It sets the list to a fixed list rather than adding to the default. That
is simpler but doesn't automatically adapt to other changes.