Folded how, top to bottom, side to side?
Select the tent card, page setup, portrait, width 4.25, height, 5.5. Publisher will
ask about two pages, yes. Insert two more pages.
The back of your card will be page two, Publisher will automatically flip whatever
you insert so it will be correct when folded. Page 3 will have your text. If you have
anything on page 4 you will have manually rotate it or Publisher will print it upside
down...
You will see what I mean in Print preview.