Have any of you used Networks for WP plugin?
I doesn't make any sense to me for the install:
Extract the plugin archive
Upload plugin files to your /wp-content/plugins/ directory
Activate the plugin through the 'Plugins' menu in WordPress
Comment out DOMAIN_CURRENT_SITE in your wp-config.php file.
Copy networks-mufunctions.php into your mu-plugins folder. This is not required but is highly recommended. See FAQ for more details.