Hi forumers,
I don't know how to translate the following .htaccess to nginx rules (from bluebox):

<IfModule mod_rewrite.c>
# Turn on URL rewriting
RewriteEngine On

# Installation directory
###RewriteBase /kohana/

# If the request is for a modules assets directory allow it
RewriteRule ^modules/.*/assets/.*$ - [L]

# Protect application and system files from being viewed
###RewriteRule ^(bluebox|modules|system|upload)/ - [F,L]

# Catch requests for XML or JSON and send them through an alternate entry point
RewriteRule ^(.+)\.json$ json.php/$1 [T=application/json,L]
RewriteRule ^(.+)\.xml$ xml.php/$1 [T=text/xml,L]

# Allow any files or directories that exist to be displayed directly
RewriteCond %{REQUEST_FILENAME} installer\.html [OR]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# Rewrite all other URLs to index.php/URL
RewriteRule .* index.php/$0 [PT,L]
</IfModule>

# Limits the file size that a user can upload
php_value upload_max_filesize 25M

# Max execution time. Is here for the media module
# After X seconds, the file upload will stop
php_value max_execution_time 300