I'm a newb to this, but from what I understand when you set up a Wiimote to run on a PC it acts like a mouse, so I would think it sends information to the driver and converts that into mouse function. But this is just a guess as I haven't done much research on it.
So the programs you need would be a Wiimote Driver. You need a sensor bar also you can make one or buy a wireless one online, and to program it into construct I would assume all you need to do is add the "Keyboard and Mouse" behaivour, find out what buttons on the wiimote equal what mouse buttons, and put in the mouse button down/click events.
Again this is just an assumption, so if I'm wrong sorry.
EDIT: I feel like an idiot, Did you mean you want your game to use motion control? if so then what I said won't help, sorry. Somewhere on these boards i saw a thread about a Wiimote plugin maybe if you search "Wiimote" you will find it.