Displaying text in a textfield by pressing button embed in a movieclip

hi… i really need help on this… following are attahcments that i will be similarly using for the site

assume i already have a hello.txt…
so… as the subject says… i want to put in the contents of hello.txt in to the field by clicking a button that is embedded in a movieclip… is there a way to this… or is there another way?
pls help… appreciate all helps and sugggestions…

p.s yes this is the second similar post to the first one…