The install was pretty straightforward. Once I launched the ER Studio, I realised that there lot of options available in this tool. There are 3 different options for creating a model:
Draw a new data Model: There are 2 options Relational,Dimensional
Reverse Engineer an existing Database: Here one would connect to a database and choose the tables that need to be modeled. This is one of the most used option.
Import Model From: This can be done on ERX file,SQL File and External MetaData.
I choose the option of Reverse Engineer an existing database, this is done by connecting to a sql server database which is set up using the ODBC setup option in the Tools menu in the main screen of the ER Studio.