The newest versions of Carrara can directly load Poser content.  All yolu need to do is open your browser in Carrara and instead of objects tab, click on the content tab.  Then tell it where your Poser runtime directory is.  After that, you can just drag and drop stuff from the browser to the main window the same way you would for objects or shaders.  You can still use the Import function to import your poser scene files as well.  And no, you don't need to export them from poser to do it.  Just save them normally from poser.