can the F90bt play the ipod or radio in the front and at the same time play movies in the rear??

No, Dual Zone is a Z-Series feature.

i have it in a 2004 expedition with dual screens in the back seats. we can watch a dvd in the back and navi in the front . it might be possible if you have screens with head phone inputs , which mine have but the audio cables aren't connected to the screens.