If it's the lower segment, it's VERY easy. If it's the upper, you'll want the help of a friend and some soapy water. Both are doable at home. I've replied in more detail in your other thread.
Please don't create multiple threads for the same thing; it gets confusing and frustrating.
If anyone has a response to this, please post it in dupra87's other thread:
http://www.toyota-supra.info/forums/...30-speedo.html