Not really, they both need to be able to read grouping and texture information, they both need to be able to set up relationships to the file parts, so it doesn't matter if it's imported or referenced there is still the file information that has to be utilised by whatever the system is. Mind, I think we're just dotting eyes and crossing tees here. :) I've tried a variety of converters for files and most of them mangle information in some form or another, I'll take a good look at the link you provided and see if that offers better facilities than I have at the moment.