And yes, a 0 in tab just means an open string. I've never seen where they indicate not to play a string...why not just leave it blank? However, sometimes you may see an X on a string, which would mean to pick the string muted for the percussive raked sound.
[FONT=Palatino Linotype]"Bust a nut!" - Dimebag
"Imagination is more important than knowledge." - Einstein[/FONT]
"Imagination is more important than knowledge." - Einstein[/FONT]