When I bought mine it was supposed to be the cheaper one, but when it arrived it had the zoom and a built in mic (about as much use as udders on a bull for what I wanted it for
) Yep, who cares about the Vista bit, tried it once for 24hrs and went back to XP, have enough software problems now without looking for more .
They are a bit tricky to take apart without doing damage, you have to push the cable in a little and pull on the end cap and bit by bit the whole plastic body slips out of the tube. I ended up carefully cutting through the plastic just aft of the end cap with a junior hacksaw till it comes off and reveals the lens tube. The inner body is split and comes apart to leave a bare circuit board. The lens holder is only held on by 2 small screws on the back side of the circuit board. Handle carefully, the wires are pretty thin.
Bill