Designing Adobe form in 7.0 pro, trouble with drop down box

[Joemonkey]

I'm working on an adobe form and I want a drop down list. I have the items in the list in a .txt file, but there is no option to import the file into the box. If I hit the + button to add an item, i can only do one at a time, if I try to paste the list, I get the first item only. Any ideas?