I want to mimic the edublogs.org/signup/ page. Who do

Hi, I want to mimic the edublogs.org/signup/ page. How do I achieve this? I don't mean the way it looks, per se, ie, the CSS. I want to mimic the form. At Edu blogs, the "chose your username/password" section is on the same page as the "choose your domain" section.

my wp-signup.php is splitting that into two pages, which I think is not ideal.

Also, it's giving the options of "Gimme a site" and "Just a username, please." I don't want that.

This seems pretty basic, so please excuse me if I'm a) dense b) not looking hard enough for an answer on the forum.