Try this sample and see if it works for you. It's a custom item that uses 17 check boxes--you can check as many or as few as you like. It retrieves the variable name and question wording from the MediaLab questionnaire. It also retrieves the colour and fonts from MediaLab and uses an extra style command to make the check boxes big like they are in the MediaLab multiple response items. Be sure to check out the section on Custom Items in the guide to see how it works if you like it.
Hope that helps!