Multiple WP install with same users database

I am creating a e-commerce website. I am using woocommerce with some cool extensions I bought. I need to make 2 websites, but store the users database (purchases, subscription purchases, etc) as well as products in a single database. The rest of the content should be different (pages, posts etc) so the administrator can see purchases from site1 and site2 while logging in to the one site. Is this possible? Sorry for my bad english.

Disable plugin / plugin action via theme

I have installed the Google Analyticator plugin on my site. I am also using the MobilePress plugin to serve up a theme designed for non-smart-phone mobile browsers. I have set up Google Analytics for Mobile for use in this theme and would like to disable the Analyticator plugin since it includes a call to a larger js file.