Um... They show his rack on the inside of the liner notes in LTE 2. You can pull it out yourself, or if you're lazy, here's what I can make out, near as I can tell, in descending order:
-Furman Power conditioner
-Mesa Formula Pre
-Something with a mesa stamp on it that may just be a spacer
-Lexicon processor of sorts
-Eventide GTR 4000 Ultra Harmonizer
-can't make this one out, but it says "rack" in big writing in the corner
-Stereo Simul-class 2:90
All of which housed in what looks rather like a Mesa rackmount case. Safe bet, anyway, as he's an endorser.
There's also obviously a whammy pedal in line on the Acid Rain solo, unless you can do that on the UH- never used one. It's a very satriani-esq lead, incidentally...
"Liquid Dreams" Petrucci says was entirely Pro Tools generated, also- it's possible some other stuff on this disc was, too.
All of which you could have worked out on your own had you bothered to take a peek at some of the pictures in those liner notes...
Also, i'm sure this might come as a bit of a shock, but there's one or two other guitarists out there other than Petrucci who have done some pretty cool work...