I appologize, the semi- thing was something else I tried previously.
Rewrite off does nothing
http://reiip.com/post/
public_html/.htaccess
### SILVERSTRIPE START ###
<Files *.ss>
Order deny,allow
Deny from all
Allow from 127.0.0.1
</Files>
<Files web.config>
Order deny,allow
Deny from all
</Files>
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^(.*)$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !http://reiip.com/post/
RewriteRule .* sapphire/main.php?url=%1&%{QUERY_STRING} [L]
</IfModule>
### SILVERSTRIPE END ###
AddType application/download pdf
public_html/post/.htaccess
RewriteEngine Off