Mail from Freepbx (in User managemnet)

Hi all, I am trying to create a mail (admin/config.php?display=userman&action=general) whith a nice touch to new users. I am trying to find what other information I can add in the mail. I only got %username%, %password%, %fname% to work correct,i want to add pincode for mailbox ( maybee) and I also want to add a picture in the mail. Are there any information to read anywhere abt. this ?