WP Super Cache Config Code

Hello,

Is it necessary for the following code to be at the top of the wp-config file?

define('WP_CACHE', true); //Added by WP-Cache Manager
define( 'WPCACHEHOME', 'xxxxxxx' ); //Added by WP-Cache Manager

Also, in using this with WordPress Skeleton would I just add

if ( !defined( 'WP_CACHE' ) )
  define( 'WP_CACHE', false );

to my local-config if I do not want to be caching on localhost?

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