I think I understand this correctly, so I'll address each area. If I miss something, please let me know.
Ideally you should have these saved as individual PNGs. You'll want one for the normal state and one for the active state, for each button.
Section 1 & 2:
I'm not sure I understand what you're trying to do with sections 1 & 2. It sounds like you just want a scroll, but you mentioned wanting to have the section fade out. That might cause some confusion if the second section isn't in place yet. Do you have an example of this you can point to?