I guess the best and only way, could be through IFC export. What platform are you on? i am on mac and NNA has not released the IFC plugin for MAC OS X as yet. If you are on windows, then you should give this a try.
http://www.nemetschek.net/architect/IFC_viewer.php.
pleas tell us how it goes.
ArchiCAD 20. MacBook Pro 17", 2010
+ core i7 4970k Hackintosh