^^agree with these guys. Surgery, rehab, PT.
buddy of mine blew out his knee playing basketball right before Christmas in 2009. He finally had surgery in August of 2011. Needless to say he has not been on a board since 2009 - he's missed our last three annual ski/snowboard trips (which included 2 pretty rad trips to UT) and he gained about 50 pounds. No joke.
my brother blew his acl playing ball too, got surgery in october 2010 and he is still not 100%. So i would get surgery as soon as you can because the recovery is pretty long.