You're absolutely right in that the Nunchuk is currently not supported 
by Remote Buddy. I think the IR mode of the Wiimote is absolutely 
awesome and now that battery-driven sensor bars are also available via 
Amazon (search for the term "sensor bar"), it's also simple to set up 
without having to resort to tea lights or homemade LED constructions.

With default settings, press button 1 on the Wiimote to activate the 
mouse mode, then point it to an IR light source. For more info on this 
subject, please have a look in the FAQ as a lot of info are available 
there regarding the IR feature.

The Nunchuk is still on the pile of hardware in my office, that I want 
to add support for, though.

Best regards, 
Felix