In chapter 4 of paper Mario the thousand year door how do you find the p to tell doopliss his name?

First you get vivian by finding the superbombomb then go into the well press "R" near the door push it up Then use vivian to pull you down come back up, go through the hole in the floor roll up, go through the hole in the as the paper log thingy, open up the chests to find the letter "P", and last tell doopliss his name (actually Doopliss not doopliss)(after that go to creepy steeple defeat him and collect the crystal star then bla bla bla you know the rest) P.S. Your welcome.