no , you can use cruors autopot (
http://www.silkroadaddiction.com / ECSRO section), or the one currently being used in SWSRO because they are practically the same files
it does only if you done have all the updated files, having an outdated particles.pk2 / media.pk2 / data.pk2 can cause crashes ingame from other players using new skills / items that your files cant register, which causes a d/c or ??? error
to save your skill bar I believe you have to delete your "settings" folder in your ECSRO folder, you can double check in the "Common Error Fix thread" also located in this same section