How do you add "Emoticons" to your emails and text messages?

[NYC Guy]

I have to be overlooking something but in the "My Documents" folder in my Sprint TP2 there is a folder called "UAContents". In that folder there is another folder I came across which contains a group of smileys called "Emoticons". However I cannot figure out how to add them to my emails and text messages. How do you use them?