I do not think that this will work. The "usual" USB cable consist of only 4 wires Very simple. Maximum length of cable is about 5 m for AWG20 and 0.8 m for AWG28 cable.
1 USB Vcc (Vbus) usually RED, wire should be 20-28 AWG
2 USB Data - usually WHITE, wire should be 28 AWG
3 USB Data + usually GREEN, wire should be 28 AWG
4 GND usually BLACK, wire should be 20-28 AWG
USB D+ and D- are twisted in cable. Outer shell is made of copper braid and aluminum shield.
Colors do not mean anything in the wiring scheme. You can use any color wire to rig something. Just make sure the colors match from end to end. Using the de-facto color is for industry types only.
The Kinect diagram shows a total of nine strands I attach a diagram with this message. So, I do not think that it is a good idea to hack that cable apart. The Xbox Kinect, when you purchase it on its own, will come with a USB converter cable that turns the special Kinect cable into a USB connection. With one of those you can attach a Kinect extension to it without cutting your cable. The extension cable is available in a lot of places like this one http://www.gamestop.com/Catalog/ProductD...
and here is a forum that discusses the extension with USB cable in detail.
http://achievementhunter.com/forum/viewT... .....hope this helps and good luck.