Installing Sql Server 2008 Express Management Studio in Windows 7

Ooops!!! This was tough part for me. After lot of surfing on this topic, i found a way to do this.
1. Uninstall the Sql Server Express 2005.
First uninstall the Sql Server 2005 from the Control Panel options
Then remove the "HKLM\Software\Wow6432Node\Microsoft\Microsoft SQL Server\90" key from the registry.
Reference :
Can't Uninstall SQL Server 2005 Express Tools
sql-server-2008-rc0-install-sql2005ssmsexpressfacet

2. Install the Sql Server 2008 Express Management Studio as given in this Article

Following are some articles those may help you to resolve this:
Can't Install Microsoft SQL Server 2008 Management Studio Express

-- In this article, it is suggested that
i. Install Sql Server Management Studio first and then Install Sql Server Express 2008
ii. Else use the "Sql Server Express with Tools" to Install.

Cheers...