yeah, of course, the electromagnetic field (as i mentioned before) creates an oscillation in other dimensions. if you set the configuration as something solid, the shield acts quite literally as an invisible wall, being invisible in this dimension but being composed of solid matter from another. this works much in the same way as star trek's famous warp engines- they cause space in front of the craft to become spread out, and space behind the craft to wrinkle and bubble, thus propelling the craft.
as for the cloaking device, i see your point. lets say your ship's radar has a range of 10 kilometers or so.(no idea whats realistic here, must do more research) the next step is determining whether or not your ordnance has the fuel capacity to reach your target, although sophisicated missiles may provide for an initial detachment burst, and enough to get them flying. inertia does the rest, and i guess the rocket would be able to conserve fuel for maneuvering (or something)
energy weapons are another story, laser or xaser (concentrated x-ray) weapons have a limitless range, while things like flak cannons are set for specific distances and locations.
thus the challenge in using laser weapons is being accurate enough to hit something (small or big) at range.
i know im probably detailing this to death, but its the kind of stuff i do for fun. i write sci-fi in my spare time.
you can expect to see some comic related goodness within.....whenever i feel like it. lazy.
For the greater good.