How to change ASP.NET version in IIS 7
1. Clich on Start Menu, Control Panel, Administrative Tools, Internet Information Services (IIS) Manager.
2. Click on Application Pools, and locate the application pool for your web site.
3. Right click on the application pool and click on Basic Settings.
4. Change the ASP.NET version from the drop down menu under .NET Framework Version.
How to change ASP.NET version in IIS 6
1. Clich on Start Menu, Control Panel, Administrative Tools, Internet Information Services (IIS) Manager.
2. Right click on the Website Properties.
3. Change the ASP.NET version from the ASP.NET Tab -> ASP.NET Version.
Read the full example at http://www.howtoasp.net/.
You could find IIS hosting providers at IIS7 hosting to use the above feature.