I am in the process of reading a good article on the Mosaic Law.  A few points that I like so far are:

1.  The author sees the references to Law in the New Testament as references to the Mosaic Law, and not to legalism.

2.  He sees the crucial passage in Matthew regarding not abolishing and fulfilling in an helpful way, that is Jesus does not destroy the Mosaic Law, but in fulfilling it he is bringing it to completion.  This is so crucial! 

I will write a bit more, once I finish the essay and have a chance to reflect on it.  But until then you can download the pdf. version of the essay from http://www.beginningwithmoses.org/

The essay is entitled, The Curse of Law, by Pete Sanlon.