Perhaps the Franks could have bolt throwing artillery http://google.com.br/books/edition/Early_Carolingian_Warfare/6Zt0BAAAQBA    

@Atrik, I've made a bit more progress in the campaign, and I'm having quite a lot of fun with it. I wanted to share a few things I've noticed. At one point, I captured a spot to found a city that was similar to the one at the beginning of the campaign. When I fought the bandits, though, I had such a large army that I was well over the 40-pop limit, so I had to just sit there and wait for the waves to come without doing anything. Perhaps that spot was meant to be discovered earlier, when the army wasn't quite so massive yet. As for the combat experience with battalions, I like it quite a lot. It opens up a range of interesting and fun possibilities. I think there's room for improvement in cavalry movement. At times, that tendency to constantly readjust feels a bit artificial and forced. It also makes it quite difficult to move battalions around. I'd perhaps try allowing cavalry to be used without a formation. Also, given that the motion rework is in place, it would be nice to experience it on these pre-built battlefields. I'd also like to be able to control siege engines individually. That would let you spread them out a bit to avoid them blocking each other and cover a wider attack area with bolts and catapults. Also, hotkeys to focus on next task, ignore next task and next turn, would be neat   Lastly, I think attack-move behaves strangely. Towards the end of the video, you can also see a bug I've run into quite often: when I use attack-move, the battalion just stands still, and the only way to get it moving again is to use the regular move command.   

That returns 404, is it private?

Do you have a link ? There are like 55 mods in the queue and i couldn't find it easily

Can probably be patched, yes