Marc Seal Guitar Tutorial 1 (Part 3 of 4): Sound Advice In this tutorial he teaches you how to get the vintage tone used by Jimi Hendrix or Stevie Ray Vaughn
Marc Seal Guitar Tutorial 1 (Part 4 of 4): Artificial Harmonics and the Solo from 'Goodbye to Romance' He also demonstrates how the Guitar Visions Player program works.
Marc Seal Guitar Tutorial 3 (Part 2 of 3): Teaches you how to you pitch shifter and octave effects to create cool sounds and the 'Mail Bag' section teaches you how to find notes on the fingerboard.