Hey there,

You can easily achieve this by enabling quick registrations under Settings > Registration . Remember to set a default profile in this section too.

Then, go to the default profile under Profile Types > [Click on the profile which you set above] . Click on the "Custom Fields" tab. For each of the field that you want to appear on the front page, ensure that the option "Appear in mini registration" is enabled as you can see here, http://screencast.com/t/fjfgXHuk1cB