First off, I made this so that I could use my Wii remote as a mouse, and that works, so yeah. And I'm not responsible for your mistakes. If something goes wrong, it's your fault, and by using this tutorial, you totally agree with that.

Materials:
1 USB Cord. This can be salvaged from a wired USB Mouse, Keyboard, anything with a male port (The part you actually plug into your computer)

4 IR LEDs. These can be bought from your local Radioshack.

Something to put your LEDs inside of. You can buy Project Enclosures at Radioshack while you're picking up your LEDs.

Soldering gun and solder.

Instructions:
1. Cut off the end of the USB Cord that DOES NOT PLUG INTO THE COMPUTER (i.e. If you used a mouse or a keyboard's cable, remove the mouse or keyboard) and strip your USB Cord. You should have 4 wires now. There's a red one, a black one, a green one, and a white one. You will not need the green or the white ones, so feel free to cut those two off or tape them down or something. Strip the other two wires (The Red one and the Black one) a little bit so that you have something to work with.

2. Now, examine your LEDs. There are two little wire things sticking out of them. One of them is longer than the other. Put them in a line from right to left. Make the short leg of the very first LED touch the long leg of the one to the right of it. I drew this picture in Paint to illustrate my point. (In the picture: The Black LED-looking things are, in fact, LEDs. The red wire is attached to the long leg of the far-left LED, and the Black wire is attached to the short leg of the far-right LED. In between the 2nd and 3rd LED is a yellow wire. That wire is to put some space between the two pairs of LEDs (MAKE SURE YOU DO THIS!!!!!!!!). I don't care how long that space is, just make sure that there is some space.)

3. Make your circuit look like that picture, then solder all of the connections. Remember: SMALL LEG ON ONE LED TOUCHES A BIG LEG ON ANOTHER LED! (The exceptions are the two legs on the far-left and far-right side that get wires attached to them)

4. Once you get everything soldered, plug the thing into a USB port on your computer for testing. Human eyes cannot see IR. Animals can, and things like cameras can. I used my Eternity to take a picture of the IR, just to make sure they all turned on. Once you have confirmed that they have all turned on (If they didn't, read the troubleshooting section below this), unplug the USB cord from your computer, and continue.

TROUBLESHOOTING: If one or two or three of your LEDs did not turn on: Try another USB port, buy more IR LEDs (Yours might be dead). If none of them turned on: try another USB port, try another USB Cord, buy more IR LEDs.

5. Now, you can drill some holes in your project enclosure for your little LEDs to poke out of. See picture. The black box is the enclosure, those little white things are the holes for the LEDs. MAKE SURE EVERYTHING IS LINED UP! Note: On mine, I also drilled a hole for the USB cord to come out of.

6. Put LEDs in enclosure, make sure everything fits, secure everything to the enclosure (I used the Hot-Glue gun). After your done, plug it in and try it out with a Wii Remote.

Connection Your Wii Remote: You need bluetooth. Connect it via bluetooth by pressing the Sync button under the battery cover of the Wii remote while the Bluetooth thing for your computer is searching for a device. It should find the Wii remote. Pair it. You will need to program called GlovePIE in order to interact with your Wii Remote.

Thanks for reading, let me know how this works out for you.