Need more info than that, what mobo have you got, where are you trying to install this sensor. What other hardware have you got. Any reasons why you want another temp sensor, in new systems they are pretty much everywhere you would need one anyway.
I have an ASRock P4V88 motherboard, and I just wanted to try and get the temperature of the CPU. I am not exactly sure where to place the sensor, as I have heard to never put it directly on to the CPU.