This document provides instructions for installing Ingres Enterprise Access (EA) in a system that already has an Ingres instance. It involves installing EA 2.6 and SP1, configuring the EA gateway by creating an ODBC DSN and gateway alias, modifying parameters and date formats, and modifying the SQL Server database by installing tables and views using the Gateway Catalog Utility. The existing Ingres instance's II_SYSTEM variable must be reset and a vNode created to access the EA instance after installation is complete.