I think its in Thought for Today 10/10/2011 at 9.30 by Ann.
She did it more or less the way I suggested except she was dealing with an image you already have on your computer rather than it being hosted from photo bucket. It sounds as if that is what you have so if you follow her instructions you should be able to do it. I woukd also suggest that you preview before sending and you will see your photo come up. Thats how you know its really there! If it is click on 'send'