As far as we know, CCSVI treatment is good for every type of m.s. Those with less disability tend to get more recovery but mostly the goal is to stop progression...which would certainly apply to RR Progresive.
The classifications are mostly being divided as: RR (relapsing remitting), SP (secondary progressive) and PP (primary progressive). I think Relapsing Progressive still falls in the RR category...it's only when it ceases to remit that it's considered secondary progressive. Hope to help.
"However, the truth in science ultimately emerges, although sometimes it takes a very long time," Arthur Silverstein, Autoimmunity: A History of the Early Struggle for Recognition