I used that method to begin with. Basically some cgi form scripts return a redirect page, like a thankyou page, and in flash, this new page would open in a new window or the same one the flash site was in, defying the purpose of having a form built into the flash site.
The tutorial says to use a main fram (where your flash site is in) and a bottom, frame, so when you submit the form:
getURL (“blah.cgi”, “_bottom”, “GET”);
the main frame stay as it is and the redirect page opens in the bottom page (and of course the redirect page is empty - so you can’t tell a page has been loaded into the bottom page) and your flash form jumps to the thankyou page.
But this is too long winded, and it’s far easier to just use php to submit your form, without worrying about frame sets.
Find out if your web host supports php and I’ll forward you to a good tutorial.