LotRO @ Curse has compiled information from within LotRO as well as from the community over the course of alpha and beta to bring you a tool which should help most people improve the performance of LotRO.
Check out our brand new Video and Performance Tweak Guide and find in one handy place all the definitions of the various graphics settings within game as well as an ever-growing list of possible tweaks you can try to better enjoy your time in Middle-earth!
This guide is laid out in any easy-to-use wiki format so you can find exactly what you're after at the click of a link! This guide will be updated regularly as new tweaks are found. We're always anxious for more info so feel free to contribute any tweak ideas YOU may have as well!
And yes, some tweaks may fix your jerky movement / hitching.