What besides the log in issue do you want to accomplish with that plug in?
With the right data model, the same solution can manage multiple surveys with multiple response formats and value lists. Setting up a new survey then becomes a data entry task, not a data base design task.
Surveys, questionnaires, forms. All good things to research on this forum.
The issue in creating the questions and answers and in collecting the response is not the problem (as I have found). The biggest problem with FM (without external means) is the List View is NOT at all flexible in Browse mode (Preview/Print have sliding up.). And anyone that has created surveys, knows that the questions are not all just one line and the responses are not always just one line "edit" boxes.
I've mostly moved any of this out-of-the-box and into HTML in some way. The Web Viewer has gotten better and if you can "submit" back to FM, it's a good way to collect those responses, too. But generally, I would use FMS for web publishing (not WD, as it has the same limitations as FM List View). With CWP, you have that flexibility to make a very good form for submitting.