I dont think the wizard is going to give you exactly the layout you are after without a little customization after the form is created. the wizard cannot create the type of box modal layout from your initial screen shot. your screen shot is basicly trying to place a container for the checkboxes inside the right column
+-----------+------------+
| --------- | +--------+ |
| --------- | | x | |
| --------- | | X | |
| --------- | | x | |
| --------- | | x | |
| --------- | +--------+ |
| --------- | ---------- |
| --------- | ---------- |
+-----------+------------+
the box modal that the wizard can create though, does not offer adding a container, it can only do standard single lines for each column:
+-----------+------------+
| --------- | ---------- |
| --------- | ---------- |
| --------- | ---------- |
| --------- | ---------- |
| --------- | ---------- |
| --------- | ---------- |
| --------- | ---------- |
| --------- | ---------- |
+-----------+------------+
hopefully my ascii illustrations help clarify this.
I think the closest you will get using the wizard is to create a text box on each line, then rename them after the wizard creates the form to create the checkbox group.
So in the wizard, for each line, create set 1 as the text box, and set 2 as the checkbox. it will end up putting 1 checkbox next to each text box.
after the wizard creates the form, rename each checkbox to have the same name, and add "[]" at the end of the name, for example:
interestedIn[]