Server Requirements
.htaccess file
You should be able to create a customized .htaccess file :
RewriteEngine On
# The RewriteBase / instruction is commented. Remove the "#" to uncomment
# RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index\.php|robots\.txt)
RewriteRule ^(.*)$ index.php/$1
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(application|modules|plugins|system|themes) index.php/$1 [L]