Step 1: The template
He described it as a free gift and encouraged people to print it out and make it. Therefore I don't think he'll mind if I use his template for this instructable.
Step 2: The tools needed
Step 3: Slice the white lines
Step 4: Notch the other tabs
Step 5: Finishing up the precision cuts
Step 6: Begining construction
Step 7: Finishing construction
Step 8: (optional) Wiring the LED
The resistor value will be determined by the LED's voltage and current rating also the 9V. I can't tell you what resistor to use without knowing more information on the LED. Therefore just use ohms law to find the resistor value needed.
R= (9v-LED's voltage) / LED's current
once you have all the components connect the resistor to the short wire on the LED. The short wire is the negative side and the long wire is the positive. You don't have to solder them you can just splice them by wrapping the wires around each other. Connect the red wire to the long side of the LED and the black wire to the resistor that's all there is to it.