In my family room there are six can lights in the ceiling. All six are switched by a pair of three-way switches. One of the six is an eyeball spot that highlights a painting over the fireplace. I'd like to be able to turn just that eyeball spot on without switching on the other five. The wiring is not readily accessable, although I suppose that the cans can be disassembled, but I imagine that the six are simply wired in parallel.

The question is this: can someone suggest an arrangement of X-10 devices (inline module/socket rocket/etc) that will allow me to independently control the eyeball spot?