Shortcut for new window with multiple tabs

Is it possible to have a desktop shortcut launch a new window with multiple tabs? E.g. - Home page is set to "www.google.com", but shortcut opens new window with tabs for "www.cnn.com" and "www.youtube.com". So far,..../Firefox.exe -new-window followed by both URLS in quotes opens two new windows. Entering -new-window "www.cnn.com" -new-tab "www.youtube.com" will open two new windows if no instance of firefox is open, but if another window is already open, youtube will add a tab to the already open window, rather than the new window with cnn.com