Sorry to insist, but inside my remaster, sudo su asks for a password, I hit enter and didn't work, tried "ubuntu", "feisty", "bananas", and whatever you can imagine, but didn't work.
Where do you think the error could be? Does your script generates this password? And if yes, if there a way to know it?
Again. sorry to be so persistent, but seems that I found a bug, or something abnormal.
If you want, I can give you details, like: machine, xubuntu version and others.
A million thanks.