Thanks for all the helpfull feedback, we've got some positive results. I've just tried putting a 3ds file through Maconverter, and much to my surprise now Poser on my mac sees it! So with maconverter I can now see obj and 3ds files in the import menu dialog. I've managed to import a large model with 16000 polygons via obj, but when I tried with 3ds it would see it in the dialog but the application quit when I hit open! I've assigned 130mb to poser, maybe I should give it more? A second test I did with 3ds worked better, I only imported part of the large model and that bit came in fine. Is 3ds more memory hungry when opening files than obj? Odd, the 3ds files are smaller on the hard disk so I thought they would be best for uploading to the marketplace...