How can i add the image in My Report

hey, 
First of all I wanna say thanks to you for this useful document.
I want to add the data into predefined template, and on the base of data i want to create the graph.
With the help of http://www.pchart.net/  i generate graph's the png image. Now I want to add it into the my report. How can i add the image into template report ?
Please help me 
