Get data from sound sensor!!!

Hi..I am new at the wolrd of Arduino and i would like some help.

I've got a sound sensor and a sensor shield for the arduino.Now i want to light up a led when the sensor senses sound.How can i do this?

How can i know which is the sensor pin that i chose as i pluged the sensor on the left side of the sensor shield at the analog-inputs?

Also how can i get data from it?Using analogRead() ??

Please answer as soon as possible..Thanks for help in advance!!!

What sort of sound sensor? Spec? Link?

Check this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&Item=170452118683&Category=162&_trkparms=algo%3DLVI%26its%3DI%26otn%3D2

Someone pls help here!!! I just want to play with my sensors and i cant find out what to do.. I tried to search the web but didnt fine sth.Please help.

Thanks in advance!

bump!!!!

I just want to play with my sensors and i cant find out what to do.

That link you posted has the code to use so I am puzzled at what you want to know. There are three connections to the board. Power ground and output. Wire power to +5 ground to ground and the output to analogue input 2.