Actually, I'm not sure that that would work. When I was trying to figure out what was going on with my event this is what I learned. If the graphic you are using is larger than 32 x 32, it centers it around a 32 x 32 space starting with the bottom middle. So with that bookcase it is taking the middle 32 pixels on the bottom half, and the centering a remaining 16 pixels on either side.
This is the image I made when I was trying to figure out how it was drawing the graphic, and the answer is, it is like the one in the top right. The pink is the bookcase in this instance and the black square is the "event" so to speak.
That is why I made the attached character sheet with an "extra row". It is now centered over 3 tiles wide.
If you add blank events to either side, it will prevent you from walking directly next to the bookcase, because there will be that "empty" 16 pixels on either side still.
I hope my explanation makes some kind of sense.