Hi Mel!
I made my hummingbird signiture in a program:
http://www.gifothon.com/signatures/?lang=en
You pay $2.70 and can use their program for 7 days.....I think......and you make all the signitures you want during that time (I think I made around 50! lol Some for me, my husband, my friends.....you name it! lol) Anyway...you make them and save them all in folder on your computer. They'll look like blank files.......but they are there! Then you 'insert' the file at the end of email (it'll still look like there's nothing there!) but after you send it that person will be able to see it. If you have any questions write me. I loved the little program! I might pay again for another 7 days to make some for my daughter in law. Roxie