.htaccess - how to tell wordpress to ignore a directory

My wordpress website has seo friendly urls like http://mysite.com/mywebpage . I installed wordpress in my /var/www directory.

However, on my server, I also have a directory called /var/www/mywebpage because that directory holds files like /var/www/mywebpage/product1.jpg, /var/www/mywebpage/product2.jpg etc...

Now everytime I go to http://mysite.com/mywebpage, the browser gives me a 403 Forbidden error because if a directory with the same name as a wordpress page exists, then the directory takes precedence. I have a few more web directories that suffer from this problem.

How do i edit my .htaccess file such that a wordpress page takes precedence over the following three directories: /var/www/mywebpage, /var/www/myproductpage and /var/www/mygraphics.

However, if someone goes to http://mysite.com/mywebpage/product1.jpg, i want them to be able to see the physical image file.

Here's my current .htaccess from Wordpress.

# WORDPRESS Rules below, DO NOT EDIT!
#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteCond %{REQUEST_URI} !.*wp-content/plugins.*
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteCond %{REQUEST_URI} ^.*/wp-admin$
RewriteRule ^(.+)$ $1/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]

RewriteCond %{REQUEST_FILENAME} !-f [OR]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]

<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>

The simplest answer (and more maintainable in the long run, without getting into more mod_rewrite or mod_alias black magic) is really to not name the directories the same as your seo-friendly-links. Use something like mywebpage_images, myproductpage_images, etc. for these directories.