The January 2008 Guitar Player magazine has an article about exactly this, focusing on Jean-Marc Belkadi's use of altered chords.
Extreme Sweeping: Jean-Marc Belkadiā€™s Polytonal Plectrum Pyrotechnics Guitar Player TV: Channels <-(if you root around here a bit you'll find January 2008 & the video & tab for his lessons - good stuff!)
He's a great guitarist, but for me to just memorize his fingerings is kind of putting the cart before the horse - I'm better off picturing a scale on the fretboard and working up my own ways through and across it, I'll certainly retain more knowledge that way. I've been into the symmetric (diminished, half step-whole step) scale lately, and it's too hard for me to picture it for long. I had to draw it up on some fretboard paper and try to work through little bits at a time. Belkadi's Example 2 is an example of what I'm trying to get to, but I have to approach it my own slow retard-o way, from the inside out. It's major triads alternating up and down - E Db G Bb Db E G E Bb - but I have to know
that, not just memorize the fingerings.
Jean Marc Belkadi Video Smoking Guitar licks - Guitar, Licks, Rock, Solo, Angeles - Dailymotion Share Your Videos Blank Tab Sheets in PDF Format http://shell.abtech.org/~holtz/tab/blank/6StringTab.pdf