Hi Dave - The only way I can think of doing this is by using the Path rule to set up your intended path. Select the required path in Driver and then drive the train yourself.
That way, the junction directions would be set for you. If the path is clear the rule would terminate with the path set. You would need to select a new path when you reach the end of the first path.
I don't know if the Path Trigger rule works in 2010, but it is worth a try. From what I remember, it can set new paths as your train crosses a trigger.
You may have given me an idea for a new driver command.
Trevor