Hey sagginmanoj - Frank had it right when he said:
- Double click the ASPNETAtlas.vsi file to launch the Visual Studio Content Installer dialog.
- Find the link above the Publish information area, it is called "View files in Windows Explorer..."
- Click on it to open the content of the vsi in Window Explorer
Run through the install - It'll be a hyperlink on the install screen where you're prompted to install the C# and VB.NET templates. That should take you to the directory where the zip files are. If you follow Frank's steps verbatim, you should be good to go.