There are so many treatment options out there, it's hard to list them all. You may want to go to http://www.lymenet.org
to the medical questions section and do a search on MS. You will find a lot of people with MS there sharing their Lyme experiences.
My friend is at a bit of a crossroads, but I think he's going to start long-term Antibiotics because they do help a lot of people, myself included, if done right. We just found out last week that he tested positive, using the Igenex western blot, so all this is still really new for him.
One of the main problems with MS is that a lot of the treatments are immunosuppresive, such as steroids, which can be devastating healthwise if you have Lyme too.