Hi Aline,

According with the e mails we exchanged during the weekend, yes, you can import the 3DS files from these sites.
There are two problems with the Dosch Designs: one is the size (in Mb) of the objects and the second is the polygons' morphology
To learn the best way to import these objects, please, follow my tutorial
http://www.punchhelpers.com/3dsfiles.html

The car attached was imported from Dosch design, the original size as 3DS is almost 2 Mb with 77 layers and thousands of different polygons' morphologies. To import it in Punch, you should process and change this information as described in my tutorial
After this you will be able to import the objects in Punch without problems

Patricia