Though it is true that Poland won only two games at last EC, but remember that you are talking here about the second team in the last WC :). Without Balic it might not be so easy for the Croatian team to score. I am not trying to say that Croatia will not win, since I am no fortune-teller. However, 1.45 for Croatia is way too short. It should be 1.80 from what I can tell.
Anyways, I hope we will be able to make some money during the tournament.