Online Flash presentation

What is the best way to develop a PowerPoint presentation that has approximately 100 slides and audio to be offered as an online streaming presentation that includes a table of contents which comes up when people start the presentation (so they can watch different parts or pick up where they left off). It is a fairly long presentation (3 hours) and it will be offered for purchase on my website. I have all the website stuff handled and I am just looking to find out if Flash is the best way to go or another way. I am also curious to know how much something like this might cost to develop from the Powerpoint presentation that I already have so I can bid it out on RAC. Thanks in advance for any help/feedback. Jon ## Deliverables just an answer ## Platform not applicable