I'm guessing you've look on the MS site... it's pretty much got all the info you'll need to set it up. I'd suggest reading everything twice before you get stuck in
http://www.bgsoflex.com/megasquirt.html
http://www.megamanual.com/index.html
http://www.megamanual.com/mtabcon.htm
start from those links and get reading!
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