Extend or Add More Features to the External List
Applies to: SharePoint Server 2010
The following links provide information on extending the external list functionality.
How to: Customize External List Forms Using Microsoft InfoPath
How to: Use Secure Store Service to Connect to an External System
How to: Add Filter Parameters to Operations to Limit Instances from the External System
How to: Add an Association between Two Database Table-Based External Content Types
How to: Add an Association between Two Database Table-Based External Content Types