quite old topic and you maybe have already solved:
1- download 3.5.0 live install iso and burn it on a cd
2- insert your compact flash in a usb card reader
3- boot your pc from iso cd created with the usb card reader connected
4- choose A install manager from mask options
5- install zeroshell on compact flash following all steps proposed and shutdown when installation completed
6- insert your compact flash in your alix 2d13 and go