How big is too big for swf?

I have a swf file that has audio associated with about 15 slides. We were having some problems with it downloading and the people that host our LMS (Moodle) said that some of the problems may be related to our CP4 settings. I have the preloader set to 25% and the file is about 8.6 MB. They said to us:
Usually when hand-coding a SWF I require 100% of the SWF to be loaded before the SWF begins to play.
8.6mb is large for a SWF provided via progressive download. The optimum is no more than 5mb for users with a broadband connection. That may be part of the issue.
Is 8.6 MB really too big for a swf? What is the maximum size this should be? If it is too large what else can I do to shrink the audio as I'm sure that's a great deal of what is making the file too large?
Thanks very much,
Whitney

Hey Whitlowe,
I had a very similar situation.  I received a 15 MB file from a "co-worker." The course was basically a converted PowerPoint into a Captivate course.  The course had 53 pages and had heavy audio.
When I initially tried to publish it to my LMS the course took about ten minutes to load.  I’m not sure if you use another authoring tool but I used another authoring tool called "Tool Book" a SumTotal product.  I had to divide the captivate course into 8 SWF files.  I then used Toolbook as a wrapper.  The Tool Book file was 8 pages.  Because Tool Book can read each page as a different SCO, the SWF files loaded one at a time. 
For future courses, I am looking at getting a streaming server.  I can house my audio on the server.  The course would launch as a shell but would link to a streaming server for the audio/video.  Not only will this improve load time but decrease my space on the LMS.  I am looking into this option and not positive what the results will be, but I thought I would throw it out there.
That is the only solution I currently know of. I’m carious of any other solutions as well.
Good luck.

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