Anyhow, yes you can connect your TiBook to a projector. If the projector has VGA input, use a monitor cable and plug in to your TiBook's VGA output. If the projector only has video input, use the S-Video output on your TiBook.
In 10.1, you'll have to put the TiBook to sleep before plugging in the new "monitor." When you awake, the two monitors will be available. In 10.0.x you had to restart. Yuck. Glad Apple fixed that.
-Rob