I can see neither of you place much legitmacy in theory. You know sometimes the only stumbling block that may limit its applied practicality is technology.
You must assume that human technology is the most advanced even as planets outside our solar system are being discovered, astronomers say that discovering an earth like planet is just around the corner.
Reading your both your comments, its funny how you both argue about how to agree with one another, a paradox ?
So Alcubierre's *theory* expands on GR rather then contradict it.
Here's another non-mathematical description of the Alcubierre's Warp Drive
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Alcubierre Warp Drive is purely a consequence of the subtleties inherent in Einstein's General Theory of Relativity. Spacetime, the union of one time and three space dimensions, is dynamic according to General Relativity. It can be twisted, deformed, and possibly even engineered by concentrations(random or selective) of mass/energy. Alcubierre's Warp Drive alters spacetime in such a way that the region directly in front of the ship contracts, while the region directly behind the ship expands. The net effect of this is that the ship is propelled on a weightless geodesic path through spacetime.