Keeping the Email Address in the field

This was an extremely usefull tool thank you so much, my question is this though I need to be able to click on an email address, open the new mail dialog and then fill in the body of the letter with the boilerplate keeping he email address in the send to field. Which command whould I use to do that . As it is the button will open a NEW mail form with the address empty.

Thanks again the artilcle was very informative.