Posting Slideshows
Since you are using Final Cut to put together your slideshow, the directions for posting the slideshow online are very similar to posting video online. The only difference will be the Custon Size dimensions you give your slideshow when exporting. You will use 480 x 360.
Go ahead and export your slideshow using the same settings as you would for exporting a video except with the aforementioned dimensions change to 480 x 360. (Exporting Video)
Upload your slideshow to Movalbe Type. (Uploading Video)
Use the code generator to create your complete code. Be sure to change the width to 480 and the height to 376. Note that the custom height when exporting is 360, but the height for the code generator is 376. The extra 16 pixels is for the video player controls. (Code Generator)
YOU DO NOT NEED TO USE THE DIV CODE FOR POSTING SLIDESHOWS! Just copy and paste the generated code into your story.