You can use the preSubmit event of the button to hide the Subforms that hide the 3 instruction pages..and in the postSubmit re-display the subforms.
preSubmit event
Subform1.presence = "hidden";
postSubmit event
Subform1.presence = "visible";
Replace the Subform1 with the relative path for each of the instruction pages.
But to make it work you need to place a Submit button instead of Email submit. That way you can control the form before it is being submitted..
For screenshots on how to set the Submit button check the below thread..
http://forums.adobe.com/thread/610512
Thanks
Srini