I'm using Entity Framework 4.2 June 2011 CTP in a small web application (ASP.NET MVC 3) because it supports enums.

I tried to deploy it using web deploy and I get the following error : 

> 
> The application pool that you are trying to use has the
>  'managedRuntimeVersion' property set to 'v4.0'. This application
>  requires 'v4.2'.
> 
> 
> 

How to create an application pool running on .NET 4.2 ?

**Edit:** The web application does work with a 4.0 app pool so the real question is how to disable the app pool runtime version check when using Visual Studio Publish option ?