When and how can I get inside Winslow's safe?

Hint 1 of 9:

You will not be able to do anything in his office on your first visit.  He
will be "busy" when you return a second time.

Hint 2 of 9:

To find the location of the safe, look behind a painting.

Hint 3 of 9:

While viewing the painting of a pitcher and fruit, move it by clicking on the
lower left corner of the frame.

Hint 4 of 9:

The numbers for the combination mean something to Winslow personally.

Hint 5 of 9:

Your clues come from a car license plate (on a small table shelf) and a
football photo of Winslow showing the score of a Harvard/Yale game.