Simple custom scroll bar

hi folks from a swedish flashwannabe.
i read your article on simple custom scrollbar. i liked the simplicity of the look of the scrollbar, and i want one just like that.

my problem is how can i make it work if i have a .swf that has a dynamic textbox, and where i have linked the text/content from an external textfile, written in notepad.

i send you my .fla and .txt to studie

/micke p