Hi Cyborg, it shouldnt be a problem at all. My settings are in swedish, but I hope I can help. I have a 8-32 myself and I have set the Apple TV on connection 2 so maybe we just copy my settings.
Start the TV, then press Menu, and then choose Connections (or press 3 on the remote). In the submenu you can choose connection 2, and set the source to DVD, and change HDMI to "Yes". Then press Save.
Exit all menus. If you now press DVD on your Beo 4 the picture from your nice little Apple TV should appear. You can also attach an IR-cable and control the ATV with your Beo 4, really nice... :-)
Best regards
Hans