Does anyone know how I would modify the htacess file below so that the first time someone hits this site (i.e. they are visiting from outside the site), they will be directed to default.php (to display a splash page) instead of index.php (whitch typically displays the wordrpress site), and then when they click on a link to index.php (from within default.php), or click on any link from within the site they will not be redirected to default.php, but instead index.php and will be able to navigate the wordpress blog within the site?

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress