Not so much a tip but a point in the right direction. These tips are really out of order!
Once you have WiiFlash working and you have your senor bar, you need be able to read X and Y values based on where you’re pointing the controller. I tried a few approaches for this, but none worked better than the code that AndrÃ©s Santos developed. Check out his wiimoteIR class and demo code. I’m using a very slighly modified version of it in my classes and it’s working great.