Maybe I can clear this up better than last time.. String muting is where you hold you left hand over the neck, just touching the strings, not holding them down. Palm muting, is where you put your palm (Ie. Palm Muting)
a lil before the briged. Basicly the same thing but to diffent sounds. As for you panterawannab I mean come on he just asked a ? to better his playing, and you bite his head off. Thats not cool man...