C# – the equivalent of LINQ-to-SQL’s ExecuteCommand in Entity Framework

I am porting an application running on LINQ-to-SQL to Entity Framework, and am having trouble finding an equivalent to ExecuteCommand:

db.ExecuteCommand("INSERT Infos (Title) VALUES ('this is an added title')");

I found this site which tells me that it is possible to implement ExecuteCommand as an extension method on your ObjectContext, leaving the existing code unchanged by adding this code to a static method in your project:

public static int ExecuteCommand(this ObjectContext objectContext,
                                string command) {
    DbConnection connection = ((EntityConnection)objectContext.Connection).StoreConnection;
    bool opening = (connection.State == ConnectionState.Closed);
    if (opening)
        connection.Open();

    DbCommand cmd = connection.CreateCommand();
    cmd.CommandText = command;
    cmd.CommandType = CommandType.StoredProcedure;
    try {
        return cmd.ExecuteNonQuery();
    }
    finally {
        if (opening && connection.State == ConnectionState.Open)
            connection.Close();
    }
}

But I've tried putting it (1) in the class where I use it, (2) in the Entity generated class file, (3) in a static class in the project, but always get various errors. Where do I need to put this method exactly?

The above site also said:

ExecuteCommand is being considered as
an enhancement for a future release of
the Entity Framework

Does ExecuteCommand() exist in the newest version of Entity Framework? I am using the Entity Framework that was installed with Visual Studio 2008 SP1.