Woohoo, congrats! I would contact the IPO so they can make up your itinerary, they just plug in the info you provide vs the conf #'s they would have obtained. We have made our own ADRs in the past and never use the itinerary they give us (I'm OCD and have daily & park index cards made long in advance) but I like to have it as a souvie to take home.
Also them having the info can come in handy. This past trip we found out 24 hours in advance our flight was canceled (blizzard - yay!) so while I had to call WDW, car rental, airline etc and reschedule, I sent 1 quick note to the IPO with our new arrival and departure dates and they handled canceling the ADRs we couldn't make (and offered to try re booking as well). So it was one less thing I had to stress over in the midst of full blown panic.