Project planning

Hi
We have a concept and some ideas of what our Flash presentation should look like and do, but we don’t know how to start translating that concept into a flash design.
can anyone describe the stages they take before hands-on coding, design and production begins? Anyone know of a good online source showing the pre-production, planning and desicion stages of a Flash project?

What we are looking at is a travelogue incorporating an audible (and captioned) audio track synchronized to call bitmaps (via xml), some interactive and animated vector graphics (maps), external html pages loading (in or outside the flash movie itself), and somevideo/ animation content.
Thanks