The Import function is under the File menu at the top left of your poser screen. you'll often need to scale a prop up or down after importing. Once they've been imported, you can save them as props into one of your props folders (or as a PZ3 file). To save as a prop, make certain you have the whole object selected, or you'll actually only be saving the portion that's selected. Try deleting the original from your scene & re-loading it from your saved prop to be sure. Many imported files have odd invisible portions that are the result of "flipped normals" (just means poser is confused about wheather a particular area is an inside surface or outside surface - inside surfaces are often invisible, or only visible from certain angles) you can expirament with the import parameters (File-Import-3DS) to minimize this, or you can use a utility like the "make double sided" utility in the free stuff. Or run it thru the excellent UV-Mapper utility. Most Imported 3DS files also have no texturing. UV-Mapper can also be used to remedy this. (Lots of tutorials for this). If you're importing a complex model, like a furnished house from the Great Buidings site, you'll have to bear in mind it will be one static prop - the doors & windows won'tr open, and the furniture can't be moved around without additional work on the model. - lots of tutorials for that, too. Good Luck!