bryce 6.1 will and i have tried this many times only export small booleans anything too complex and it crashes also it can and will make a real mess of some if you try to import  it back in 

my biggest problem is the file sizes in bryce 6  there a lot smaller than bryce 5 but the trade off its that if you zip them up to post in the store you save about 5 megs at the most which is a real pain as my models are pretty file heavy