I created a Flash header to use in my HTML site, which I've never done before,
so I need some help.
Ok, so here's the draft I have now:

http://www.whsphealthcaremanagement.com/index_HCM.html

I want the header to be static, and the white area to be where the page
content appears (it should be scrollable.) I don't think my host supports SSIs.
so how would I do this - in frames?
if so, what would the action script look like on my button in Flash? how do I
get the page to open up in that middle frame?

Why dont you just make the whole page in flash....i believe that this would be
much easier. Set each button to use gotoAndStop to go to a specific frame in
flash. Send me a message if you need more help.

I think to accomplish what you're looking to do, you'd have to have your Flash
file call a javascript routine that resides in your SWF's HTML file.

The javascript routine would then set the SRC of the frame. Info on setting
that up can be found at: http://www.permadi.com/tutorial/flashcalljs/

In terms of what the Javascript code should say and do, you'd want something
like:

if (command == "changeFrameSrc")
parent.content_frame.location = args;

For the Javascript code to work, you'll need to make a small change to your
FRAME tag in your HTML file:

<FRAME SRC="defaultsrc.html" name="content_frame">

It's the name="content_frame" part you care about.

Let me know if you need any help.