Here is a project for the Wampler Pedals "Triple Wreck" super high gain distortion pedal. The Wampler Pedals site provides this description:
With a solid three band EQ (total control allowing you to scoop out those mids without it peeking out the lows and highs like so many other pedals) you can emulate some of your favorite high gain tones, but as this pedal is so versatile, you can easily find a distinctive tone all of your own. There is no much control over the tone your distinctive sound is waiting for you. Believe it or not, even when the gain is backed off, this pedal is still useable, still sounds great.
There are two distinct voices in this pedal, Vintage and Modern. The vintage gives you that warmer thump high gain where as the modern allows a little more sparkle to creep in, giving it that more recent, full audio spectrum feel."
For a demo video check this out, it really is high gain!
What a monster! Well, there is a project available provided by the freestompboxes.org forum, here's the schematic:
And a great vero layout (Harald Sabro of www.sabrotone.com, visit his site and check out his other vero layouts, there are some really good ones there!):
Here is a PCB layout by R-Customs: http://www.mediafire.com/?wu44zangr04mrw1
Here is a picture of R-Customs' completed build:
How good is that? Anyway here's the freestompboxes discussion thread: http://www.freestompboxes.org/viewtopic.php?f=7&t=10737