1. Run IIS Manager    Run inetmgr
2. Create Virtual directory for the web application in IIS
3. All MIME types needed to support Silverlight are implemented by default in IIS 7 and above in Windows Server 2008 and Windows Vista SP1.
 Windows Vista, xp (IIS 5) can add MIME types by running IIS Manager, clicking proproties/ HTTP Headers/ MIME Types,
then clicking Add, and then adding the following MIME types:
    .xap application/x-silverlight-app
    .xaml application/xaml+xml
    .xbap application/x-ms-xbap
4. Make sure ASP.NET version in IIS is the same with the compiled web application (for instance .NET framework 4.0)
5. Set up write permission for folders needs accessed by other processes.
     in IIS 5 right click -> all tasks -> permission wizard -> make sure read/write permission is enabled