Hi, John,
To do longer jobs than a table can handle, I make a series of dowel pin holes down both sides of the job, that match a series of dowel pins in the spoilboard. That way you can break up the job in smaller jobs. Set your piece up on the first set of pins, then run the first program. Next, slide the job down onto the next set of pins and run the second program, etc.
Now obviously this is easier with some CAD/CAM programs as opposed to others (I use Vectrics VCarve Pro), but once you get the idea of how to do it, it becomes easier to implement as well.
Hope that helps,
Dave