well, here's the little thing I followed..
http://www.westga.edu/~stu7440/projects/snes.html
this tells you most of it.. though I had to make a little tool to check the cable for which prong went to which wire.
tool:
grab a reasonable length of wire to make the tool. cut it in half so you have one to touch to one side of the cable and the other to touch the other side.
take an AA battery put a flashlight bulb on one end of it and attach one of the wires to the upper part of the light bulb (there are the two areas of the bulb pos and neg) tape these in place. then tape the other wire to the base of the battery. Then cross the other ends of the wires to make sure the light lights up. I found sometimes the bulb can float a bit away from the battery and needs to be held down.
Anyway.. how this should work is you touch one wire and then progressively touch each of the prongs untill it lights up.. then mark the colour and prong number this way you will know what wire to solder to.
anymore info you need just ask.
moo