I have it working now - actually, quite by accident. It used to be all so easy.
Up front, I have to say, I am using "Menu 2" (I believe it is) which is the icon view, with text titles. I'm not sure if this works in other configurations, as I do not use them. If anyone wants to jump in and say 'yay' or 'nay', feel free.
I started with the Plugin, which as I understand now, might be a bit more difficult to find. I can't tell you how to do that, as I already had it available on my system, but once you have it, add it to your Favourites. Once you have it, your FAVOURITES.XML file (located in C:\Users\[User Name]\AppData\Roaming\XBMC\userdata) should have lines that look something like this:
Code:
<favourites>
<favourite name="Apple Movie Trailers - Lite" thumb="C:\Users\[User Name]\AppData\Roaming\XBMC\addons\plugin.video.apple.movie.trailers.lite\icon.png">ActivateWindow(10024,plugin://plugin.video.apple.movie.trailers.lite/)</favourite>
</favourites>
(In all examples "[User Name]" will denote your particular username, being used on your own system. As I understand it, "AppData" may instead be "Application Data", depending upon your particular OS.)
Now, you do NOT have to change ANYTHING in your FAVOURITES.XML, but you should copy out the "ActivateWindow(10024,plugin://plugin.video.apple.movie.trailers.lite/)" code from within. This is what you will be using - sort of - for the addition to the Main Menu, which is what I did.
To add the Trailers to your Main Menu, I edited the INCLUDES.XML file (located in C:\Users\[Username]\AppData\Roaming\XBMC\addons\skin.alaska\720p) and inserted the following code into the section where all of your Main Menu items reside:
Code:
<item id="14">
<description>Trailers</description>
<label>Trailers</label>
<icon>special://skin/homeicons/trailersicon.png</icon>
<onclick>ActivateWindow(VideoLibrary,plugin://plugin.video.apple.movie.trailers.lite/)</onclick>
</item>
Now, please note that I have changed "ActivateWindow(10024,plugin://plugin.video.apple.movie.trailers.lite/)" to ""ActivateWindow(VideoLibrary,plugin://plugin.video.apple.movie.trailers.lite/)", which was my 'accidental' change... ...but it works. I simply read all of the other lines of code that did have what I wanted, and I thought, "oh, maybe this will work"... By doing this, you will have the ability to use "Poster Mode".
Enjoy!