Download file:  Component: Add Company Tab Assistant   

This component allows you to enter the name of an existing view. It will then create a new custom list based on the view and will change the company tabs group to allow the list to be called from the company context. You will need to enter the name of an existing table - a view based on that table view and the table name prefix e.g. opportunity/vQuoteOpportunity/oppo

The view MUST include the column comp_companyid.