Thank you for your question.
Indeed, there is no help for the beta [yet], although we are working on it. Still, the operation of the current version is similar to the old DockingManafger - you drag RadDock to the form and use the smart tag to add the needed docking windows. You have probably figured this already, I would assume :)
If you need further help on custom actions, please let us know and we will try to help you as fast as we can.
the Telerik team