After you have completed steps 1-5, merge the application, the consent/assent forms and your methodological instrument into one document, and save using your last name and department.
Then, have your faculty research supervisor review your application, and make any changes that s/he suggests.
Your application, consent/assent forms and your methodological instrument needs to be ONE document. Failure to save everything as a single document will result in your IRB application being sent back to you.