If you are interested in a Flash header with Atahualpha theme, see Adding Flash Header to WordPress Atahualpa Theme (ver 3.4.1).
This enhancement allows use of %flash on Header Options page and provides Alternate content for non-flash vistors.
BFA, this is a great theme! kudos to you and your efforts. I see you cleaned up bfa_header_config.php in ver 3.4, since I originally implemented this on ver 3.2. Actually your robust programming made it pretty easy to add a %flash header element. Hopefully you can incorporate this into future version!
Cheers, StellaBlue