Java Development Tools

Hi All,

I have a process train that spans over 3 page fragments in my bounded taskflow. On my first page I have a 2 tables which behave like the shuttle component, you shuttle selected values from to another.

By default the "Next" button of the process train is enabled on the page. Is there anyway I can disable the "Next" button by default when I land on the page and enable it only when the user shuttles values from one table to another. In short how can I control the behaviour of the process train buttons. Can the same be done for the Process Train Bar on top of my page?

Thanks