@Ramanan, I think you need to define your question a little more specifically. There could be several hundred different answers to your question as it is far to general. You need to map out for yourself exactly what you are trying to achieve in detail, and then once you have defined this you need to provide a more detailed question so that people in this forum can offer help depending on exactly what you are trying to do. Do you want to store an image in product.template? Where would you like it to be 'retrieved' to, what view?