_config.php

<?php

$config = Config::inst();

DMSSiteTreeExtension::show_documents_tab(); //show the Documents tab on all pages
DMSSiteTreeExtension::no_documents_tab();   //and don't exclude it from any pages
DMSDocumentAddController::add_allowed_extensions(); //add an array of additional allowed extensions

define('DMS_DIR', 'dms');

if (!file_exists(BASE_PATH . DIRECTORY_SEPARATOR . DMS_DIR)) {
    user_error("DMS directory named incorrectly. Please install the DMS module into a folder named: ".DMS_DIR);
}

CMSMenu::remove_menu_item('DMSDocumentAddController');

ShortcodeParser::get('default')->register(
	'dms_document_link',
    array('DMSShortcodeHandler', 'handle')
);

if ($config->get('DMSDocument_versions', 'enable_versions')) {
	//using the same db relations for the versioned documents, as for the actual documents
	$config->update('DMSDocument_versions', 'db', $config->get('DMSDocument', 'db'));
}