A while back I said I was going to make a Vai preset and since I said I was going to play with the delay thing for this thread, I figured I'd get two birds stoned at once. I kind of 'cheated' with the delay thing and used 2 digital mono delays to pull it off. I'm sure there's a way to program the Dual Delay, but after a minute or two of dicking around with it, i just decided to make it easy on myself. Playing with the tempo should get it there. Also need to find a way to stick the normal delay in there. Haven't figured out where to put it in the chain yet so it's not effecting the other delays.
I'm going to keep building on this preset. I'm a bigger fan of his '95-96' tones than any other period, so that's more of the direction the preset is starting. Eventually I'll drop in a Passion And Warfare scene. Listening to isolated tracks from Passion and Warfare then to something from Alien Love Secrets, there's a big difference in tones. He was using several amps at once on ALS/Fire Garden and you can really hear it in the isolated track of "Juice", there's a midrangy amp doing the main work but what sounds like a really buzzy Marshall very slightly in there, it almost sounds like a head without a cabinet going direct in the board. You can hear it much better with headphones.
You'll also need to select a new cab unless you have York's Friedman cab pack, which is what I used for it.
Little preview. (Note, I have Out/In 3 for my FreQout pedal, which is how I'm getting those higher pitches/feedback kind of things)