Let's say you make sure the directory webservices with all underlying files are put there like this:
# all management webservices will be placed here
  file {"/var/www/localhost/webservices":
    ensure  => present,
    ignore  => ".svn",
    recurse => true,
    source  => "puppet://testpuppetmaster/files/templates/services/apache/var-www-localhost-webservices",
    owner   => "webservices",
    group   => "webservices",
    mode    => 644,
    require => [ File ["/var/www/localhost"], User ["webservices"] ],
  }

For a specific node, I want to override 1 file in that webservices directory ? How do you do that ?