JQuery Validator, how to use a custom position for a specific error ?

Question

Let say I have the following form. I need to put the error message of the checkbox a bit differently from the other element. The point is that I don't want the error message between the checkbox and the text.


Let say I have:
Name: [textbox] error here (required)
Email: [textbox] error here (required + email)

Interests: (at least 2 checked)
error here
[checkbox] Foo
[checkbox] Bar
[checkbox] Bla
[checkbox] Blu

Right now I have this code:

   $().ready(function(){
        $("#signupForm").validate({
      rules: {
                name: "required",
                email: {
    required: true,
    email: true
   },
                "chkinterest[]": {
                 required: true,
                 minlength:2
                }
      },
      messages: {
                nom: "Enter your name.",
                email: "Enter a valid email.",
                "chkinterest[]": "Please select at least 2 elements."
      }
     });
    });