Also, just for posterity, games that use the Wiimote like a lightgun were absolutely awful. I think this was because the devs of these games had the idea to make these sorts of games without understanding the difference between actual lightguns and the Wiimote's relative positional aiming, using the lightbar as a real-world reference point to judge aim and distance. This is also why most Wii games use a cursor; because the aiming isn't 1:1 accurate.
For other users that may stumble across this thread via Google or some other search engine:
^Be sure to set the 'Sensor Bar' position. (It doesn't actually sense anything. It just emits infrared light that the infrared camera in the Wiimote picks up.) Placing the light bar opposite of what is set in Dolphin's (or a real Wii's) settings will also cause aiming to be way off.