Loading txt files in as3

I’m having real trouble in as3.
This used to be simple but…

I have a flash file with 5 dynamic text fields with instance names… textfield1, textfield2, textfield3, textfield4, textfield5

I really need to have one simple .txt file that someone who doesn’t know anything about html or xml can easily edit INCLUDING the addition of simple formatting like <a href="">

In previous versions of AS it was as simple as referencing a txt file that included…

&textfield1=<a href=“http://yourdomain.com”>Hi there!</a>
&textfield2=
&textfield3=

and so on…

For the life of me I can’t find an easy way of doing this. Can anyone help?

Much appreciated!