WP-MU / Network Support?

When creating a new site on my network, WP-Ratings doesn’t appear to create the tables that are necessary to be used on the new site. To resolve this I go in and manually deactivate the plugin, then reactive it. During that process the necessary tables are created. Is there a way to automate this creation of tables?

Additionally, on the front page of my network I’m displaying posts from all the spaces, but the ratings seem to try to load only from site 1 when I switch_to_blog to site 2. Any suggestions on how to load the ratings display and making them interactive for a sub site whilst on the main site?