Weight Mapping A Model

I have the conscript body from the Half Life 2 leak, but it doesn’t have decent weight mapping (especially in the shoulders), would anybody be willing to re-weight map it?
Download Link: http://www.mediafire.com/download.php?5oqe2ae1nbh72iq
OR
Does anyone know a good program to use for weightmapping along with some tutorials? I tried using blender to weightmap it myself, but it ended up worse than when I started >.<

Sorry for bumping, but does anybody atleast know of a decent program to use that is better than blender for weightmapping?