I have never created a site with the Godaddy webform, but based on their How-to it looks pretty straightforward. Here is the page where they give the relevant information: http://help.godaddy.com/article/512#webformmailer
1) The page including the email form, that you will create in Quark, will be have a "html" ending, something like "contact.html". You don't have to create an .asp file -- you only need to refer to "_gdForm/webformmailer.asp" in the form field you will create.
2) Exactly, you reference your form to _gdForm/webformmailer.asp in the "action" section.
3) If you haven't done yet, go to http://8.quark.com/quarked.html and download the WebLayout tutorial, which includes a chapter about webforms, very similar to what you want to do. Once you understand how this works, you will be able to add all the fields and buttons. Also add the hidden fields that are indicated on the Godaddy help page (create a text input box, and change the Type to Hidden Field). Notably the field name="redirect" value="thankyou.html" is important, since it defines to which page the user will be redirected after submitting the message.
4) When you export the contact.html file, open it with a text editor (on the Mac TextWrangler will do a good job) and verify if the section included between <form action=" ... and </form> is similar to the one shown on the Godaddy help page, and features the hidden tags.
5) Now you can upload the contact.html file to your web space, and see if it works. Make sure that you have specified a recipient email in you Godaddy control panel.
Manuel S.
Technical Support Representative