They ask for Your passport, Appendix B and 4 more photos if your application has been longer than 6months, because they require max 6months old photo. Hope I didn't confuse you. So for me, I didn't want to send my passport since I am travelling. So I emailed Sydney immigration and they informed me that since my passport is Australian, I can photocopy every page of my passport and send that instead. Appendix B, is very easy to fill out, takes 2seconds. They send you a PDF attachment of the letter and requirements.
I posted mine last week through UPS, Sydney immigration haven't replied or responded. I'm hoping I will hear some good news this week or next week. Eagerly waiting.