There's actually tutorials you get when you purchase. You load it on your server. I think it's php based.
In essence, you log in, change the creative you want to test, and it splits it for you. But wait there's more...
With this you can apply the multi variant taguchi testing method, all on multiple aspects of things you want to test. So in essence, you create something like 18 creatives because you're testing A/B:
Headline
subhead
lead
bullet blocks
offer
guarantee
ps's
etc.
I couldn't explain the math to you, but there's some unique algorithim that eliminates the need for a classic A/B split.
I went to a great seminar in Vegas about a month back for this stuff. Guys name was David Bullock. Well worth every cent.
Zachary Romero
www.profitableink.com