nm, I have figgered this out. Thx
Few tips for people still thinking this is too hard.
For starters check this page to learn about LEDs, along with what side is the LEDs ground.
kpsec.freeuk.com/components/led.htm
second the “Circuit Diagram” shown(on hackcanada.com/homegrown/wetware/brainwave/) must be followed 100% you can’t just hook up random wires and still have it turn on and off. So you need to know the number of the wire. As for readding it, at first I was like WTF but an easy way to look at it is that the trangle is the +plus/power and the other side of the trangle is the ground.
If your using the printer cable you have one major ground, unlike the parallel ports 18-25, and of course the ground is the one without the plastic protection on it.
And the way to label the wires on the printer cable is to use a battery and put the ground on the -(negative) and then put one of the color coverd wires on the + (positive) on the battery. Then using the LED drag it along the other side of the cable(the one that is going to connet to the computer when your finished). You only need to touch one pin at a time with the anode side of the LED, the cathode side can just touch the metal side of the connecter. If your saying WTF to the last sentence then read the LED page I posted above. When the LED turns on you have found your number, the number should be printed on the inside of the connecter. Might need a light to read it.