MS CRM 4.0 How to view detailed Error Message

It is a common practice for the developers working on MS CRM to view the exact error message to fix the issues instead of seeing the custom error page displayed to the end user.
In order to view the error message, below are the different options available

1. Enable Trace which logs the details of the error. This can be implemented on live server so that end users still see the custom error message instead of the original error
2. Modify the web.config file to set "DevErrors" to "On" on the MS CRM server as per the below microsoft article http://support.microsoft.com/kb/857192