[Ed Kolis]

No, this is not possible in SE4, and it cannot be modded in. In SE2 and SE3, you could do this, but then also the spaceyards worked differently in those games - they basically functioned as repair bays do in SE4, as you "purchased" hulls (paying for them up-front) with "damaged" (unbuilt) components and the SY's job was to "repair" (build) the individual components. But in SE4, when you build a ship, the construction cost is spread over the time it takes to build the ship and the ship appears fully built when the cost is paid. I suppose it might be possible to combine the queue-management aspect of SE3 with the spread-out cost aspect of SE4, but to my knowledge at least SE5's construction queues will function identically to SE4's, with a few exceptions (you will now be able to "spill over" points from one project to the next, for instance)...