    There's no one way to write a song. Some writers work on it,
and then pick it up again later. Sometimes they hit a snag, and
give it up altogether. But one group of musicians has devised a
unique kind of songwriting system.  Acacia Squires has this
story.   BOB SCHNEIDER: (Singing) I can't say your name without
my mouth filling up with flames...  ACACIA SQUIRES, BYLINE: This
song's called "The Effect" and it's off Bob Schneider's album,
"A Perfect Day."   SCHNEIDER: (Singing) At first, it gave me
quite a scare, and now I like the effect...  SQUIRES: He wrote
it in just a few days. That's how he does it. For 12 years, he's
beaten back the urge to procrastinate by writing a song once a
week, every week. It began casually, with just him and a friend,
sharing their songs.  SCHNEIDER: I'll go home, write a song; you
write a song. And then we'll come back here in two days and play
them for each other. And that's, basically, how it started.
SQUIRES: Now, it's grown into an Internet-based, deadline-
driven, song-