Multisite / Network support?

Hi,
I tried to make this plugin work with a Network install (sub folders), but it seems that one would need to install and configure the plugin per site. Otherwise the button that says “login with google apps” takes you to the http://wp-glogin.com/installing-google-apps-login/#main-settings page.

http://ww.wp.xz.cn/plugins/google-apps-login/