<< Add columns or a straight-out table >>
I was going to say to use a table in Word. I like them a lot. In fact, at work we have used a 3-column table to create a left text column and a right text column (center table column is the gutter). If you just keep typing into the column it will continue from one page to the next. Just keep in mind that if you want to insert a tab into your text you must hold down the Ctrl key or it will move to the next column instead.