No, it's dead easy. But you don't need one (I didn't at least), adds weight and the you'll have no weher you put your muddy boots..
Check out this link:
http://www.backcountry-equipment.com/tents/hilleberg_nallo2.php
About a zillion pics of Nallo (and a bunch of other tents), scroll down and click on "Additional photos", of set up, inner, outer etc etc.