Harry potter IMAX in MN?

I live in Minnesota, and I know that harry potter and the order of the phoenix is in IMAX in some theaters. I was wondering, is the whole movie in IMAX in those theaters, or just the last 20 minutes??? and is it in 3D in every theater (Eden Prairie AMC?) or is the last 20 min in IMAX in only the IMAX theaters? those who have seen it in an regular movie theater, was the last 20 min in IMAX, or not?? any other info is welcome.