RAGE guitarist Victor Smolski's site has been with the following on School Of Metal, his first official instructional DVD:
"With the example of four songs, Victor leads you through the heroes-history of metal guitar. Starting with the classic heavy metal á la IRON MAIDEN and JUDAS PRIEST, passing thrash metal in the style of early METALLICA, up to speed and progressive metal, you can find the best licks and riffs.
You are taught the most important style elements of rhythm guitar: metal chords, downstrokes, harmonic riffing a.m.m. Furthermore, Victor shows you how to pimp your performance with slap-technic and special-effects.
Nevertheless, you also discover, which secrets other great guitar heroes like John Petrucci, Dimebag Darrell and Paul Gilbert use to make their performances unforgetable.
The DVD includes almost 1 and a half hours play time within play-along versions of the 4 examples. You recieve an instructional 32 page book with all the notes and TABs. For 9,90 EUR you can buy the School Of Metal, out on March 11th!"
Video examples and further information here.