need advice about using sd card w/ arduino shield

Here is my hardware:

TFT LCD Screen Module: ITDB02-3.2 ITDB02 LCD Arduino Shield Arduino Mega SD card

I am trying to get one image to display on my screen for a prototype I'm working on for my thesis. If you have any advice to how I would go about this, please let me know. I have the screen working with the demo code (http://iteadstudio.com/produce/itdb02-lcd-shield-for-arduino/) but would like the find out the most efficient way of programming my arduino to send a picture to the LCD screen.

If you can help, please post advice. Thank you! :P