hei shark76,
k. hope this will be clear.
1. make a button and two textfields (one of them editable)
2. give them unique names in the cast window
3. put the textfield (the editable one, where the user has to enter his name) and the button on the stage on frame one. loop the movie
4. on the button you want to add this behaviour:
on mouseUp me
if member("yourFieldname"

.text = "" then
alert("Please enter your Name first!"

else
member("yourOutputFieldname"

.text = member("yourFieldname"

.text
go to frame 5
end if
end
5. on frame five you the output textfield. loop the movie.
done. if you have problems, i'd have you a small samlpe file (director 8.5).
cheers
adrian