Blender 2.5.x Video Tutorials #6 by Neal Hirsig file

Array Modifier, Bevel Modifier, Boolean Modifier, Curve Modifier, Simple Deform Modifier, Multiple Modifiers, Bezier Curve and Circle - Handles, Bezier Curve and Circle - Extrusion, Bezier Curve and Circle - Loft Beveling Along a Path, Bezier Curve and Circle - Lathe Beveling along a Path. All credit for this set of video tutorials belongs to Neal Hirsig.