Depends on what your trying to import, if its an obj file go to the file menu and on the dropdown select import and choose from the list the format and from their it will ask for as file location. Most likely it's in a zip file and you will have to unzip it to a folder of your choosing before using the import option. If your talking about clothing,figures etc. I use 7zip a free zip file opener to unzip the files directly to Poser. It will install the files to the correct directories within poser. Hope this helps remember when i started with poser i was in the same boat.