To not turn around your question just to notify you that you can use a standard distribution such has Debian, Ubuntu ,CentOS, OpenSUse, Mandriva, Fedora.
Install yourself the prefered distribution on the usb stick most distribution allow to install Linux distro to an USB.
AFter install your distribution you can use setup-* to install artica on it.
You will find here :http://linux-mail.org/index.php/get-a-d ... ll-distris
The result will be the same has an Artica ISO.