Sugar 4.5.0e comes with a fix to configure group tabs and show in groups of selected tabs. With this fix we can create a groups of tabs which will be visible as the sub-navigation below the main tab. To configure, I created a new group tab called Personal Data and then added the modules Home, [...]

Using this table list as a blog equivalent of an ER diagram: relationships acl_roles acl_actions leads contacts accounts opportunities cases notes email_templates emailman calls emails meetings iframes tasks users currencies tracker import_maps files users_last_import config upgrade_history vcals bugs versions releases feeds project project_task roles email_marketing campaigns prospect_lists prospects documents document_revisions fields_meta_data schedulers schedulers_times inbound_email campaign_log [...]

You can install many instance of Sugar on a single database server but you may require to create different databases names for individual instances. This will restrict the users of different instances to view the data of other instances of Sugar.