Store root password in portable_settings.txt

Hi,

how can I store the root password in the poprtable_settings.txt prior using the first time?

I want to deploy a portable version with an allready sored password. I know it is stored when I create a session and save it, but it is decrypted. Or is there a way to create my password decrypted so I can just enter it in the .txt file?

I know how unsafe that is, but still.