hi, first , the shield on your hand without SD card socket is TFTv1.0
so , please check the wiki:http://www.seeedstudio.com/wiki/2.8’’_TFT_Touch_Shield_V1.0#Resources
i have upload the lib for arduino IDE 1.0 to the “Resources”, you can download it and install the 2 lib to your \arduino\libraries
. 
you can begin to study this shield from the samples in the \TFT\examples…, and you do not need to change any code no matter seeeduino or mega you r using.