Arduino UNO GSM Project

I need someone to write a working sample code for Arduino UNO for the following GSM Shield. "SIM900 4 Frequency GPRS / GSM Shield Development Board Module for Arduino E107" (Please see attachment) [login to view URL] Here is what I need:- - I will send a text "hello" and the module will reply back saying "Did you text" - I will call the module, the module will text me back saying "Did you call?" - Everything must be working on my end - Bid mentioning "TX" so that I know you read the requirement or else your bid will be deleted. Feel free to use any library you want or get the code from anywhere you want. The code must be simple and well commented in proper English. All I need is a working interface between GSM and Arduino. Since the project is very basic, lowest bidder wins.