Conveniently, you don't need to do anything special to use the Calendar or the Login menus. If you do <!--System:Calendar--> It'll insert the calendar right were you place that code. For things like Raid Progression, and whatnot, All you'd have to do is <!--System:Menu:Raid Progression--> and it'll insert the menu progression bit.
true, but my problem is modifying the menus to work with my graphics. For example the calendar menu:
Notice that my menu layout consists of a background covering the entire thing, a header with a doodad and the title, and a footer with a doodad. The calendar menu calls the header twice, which would end up giving me a double doodad and bad tiling of the background. Without remaking the menu code I also don't see a way to add the footer. I am not very experienced with CSS which might be my problem, but it looks like I can only modify the different parts (ie set what header looks like, and what the content looks like), but not change how the menu calls these layouts.