separate instances of Thunderbird or Kmail

[Alvin]

On Wednesday 30 July 2008 13:59:38 Gordon Schulz wrote:
> On Wed, 30 Jul 2008 12:57, O. Sinclair <o.sinclair at gmail.com> wrote:
>
> [...]
>
> > So I am looking for a way to run a second instance of Thunderbird or
> > Kmail that is totally separate and "unaware" of the "main" ones.
>
> [...]
>
> Am I missing an obvious point here or isn't that easily done changing
> Profiles in Thunderbird and/or KMail?

I think it's a bit more. He wants to run different profiles at the same time.
Take a look at the following link:
[http://kb.mozillazine.org/Command_line_arguments_-_Thunderbird]

Apparently it can be done with   -profile "path"
There's also an explanation of why you shouldn't run multiple copies of 
Thunderbird with the same profile and how you can do it anyway.

-- 
Alvin