I have a table of skills and a table of EmployeeSkills. to display this on a form, I use a CheckboxsetField and it works great.

But now, I am being asked to add a dropdown list of skill levels for each Employee Skill.

So what I want to do is have
a checkbox and a dropdown list next to it
a checkbox and a dropdown list next to it
a checkbox and a dropdown list next to it

and so on.

Is there any way to say something like

<% control MyCheckboxSetField %>
   <div class="field checkbox">
      <label class="left" for="{$FormName}_SkillName">Skill Name</label>
         <div class="middleColumn">
            $dataFieldByName(Current Iteration Of The Checkbox List)
         </div>
      </div>
   <div class="field list">
      <label class="left" for="{$FormName}_SkillName">Skill level</label>
.
.
.
      </div>

<% end_control %>

As I read this, you want to create some sort of nested CheckBoxSetField where the 'inner' options are represented by dropdown fields. If that's what you mean, I don't think it can be done.

Can you give us an idea of the relations involved?