So, I stumbled across this article on PC Gamer: http://www.pcgamer.com/2011/11/02/lord-of-the-rings-last-days-mod-released-for-mount-and-blade-looks-amazing/
Speaks for itself really.
The Lord of the Rings Last Days of Middle Earth mod for the original Mount and Blade has been released after five years of work. The mod lets you fight and command all the factions of Middle Earth, no less, with some top notch custom armour sets, new textures and new locations designed to bring Middle Earth to Tale World’s medieval rags to riches pillaging sim.
Here's the download : http://www.moddb.com/mods/the-last-days/downloads/the-last-days-of-the-third-age-30
And here's a very simple guide on how to get it working with Warband (I don't know about F&S compatibility I'm afraid): http://forums.taleworlds.com/index.php?topic=199809.0