htaccess: can’t approach wp

Hi,

I just installed wp next to an existing site to make an redesign in WP.
But I can’t reach the wp directory and I get an 404. I find out that the problem is the htaccess file. I can’t delete the file otherwise the old site doesn’t work anymore.

Can anyone help me to write an line that make an exception to the wp dir ?

content of the ht access:

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www..*
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST} ^([^.]*).(nl|nl/|eu|eu/)
RewriteRule ^.*$ http://www.%1.%2%{REQUEST_URI} [R=301,L]
#alias rules voor project
RewriteRule ^project/([0-9]{1,7})/(.*)/?$ /bekijkproject.php?pid=$1
#rewriterule voor publicaties
RewriteRule ^(.*)/artikel/([0-9]{1,})/(.*)/?$ /bekijkpublicatie.php?id=$2&page=$1
#Archieflink
RewriteRule ^([^/\.]+)-archief([^/]{0,})/?$ /content/$1.php?archief
#Redirects
RewriteBase /

RewriteCond %{HTTP_HOST} ^www.rrssc.eu$
RewriteRule ^testimonials/?$ content//testimonials\.php [L]

RewriteCond %{HTTP_HOST} ^www.rrssc.eu$
RewriteCond %{THE_REQUEST} /testimonials\.php
RewriteRule ^testimonials\.php$ http://%{HTTP_HOST}/testimonials [R=301,L]

RewriteCond %{REQUEST_URI} !^/content/
RewriteCond %{REQUEST_URI} (\.php$|\.htm$|\.html$|^[^\.]+/?$)
RewriteRule ^(.*)$ /content/$1