geez..can they make it any more complicated?..here's the solution to solving it
Arrange the alphabet, letters A-X on the bottom where it says "PARK, EXIT." The A and the X are done for you. Letters go left to right, dont worry about Y and Z. Now the clue "Flowers first" tells us to correspond the letters to the flowers before we do the curtains. So, Starting from the top story, 2nd window from the left, we see a BLUE flower, that corresponds to the BLUE letter "W" all the way directly below it. Repeat steps for all flowers and curtains and you get the question, "Who was Romeo's first love?" The answer is Rosaline, not Juliette.