You could use MEF, exporting a settings view from each view model and importing them as a list of views that you add to a stack panel or some such in your main settings view.
A good source of info of using MEF is: http://mef.codeplex.com/wikipage?title=Guide
Here is a sample program I meant to get up sooner:
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;
using System.Reflection;
namespace zTestConsole
{
public interface ISimple
{
string Message { get; }
}
[Export("SimpleHello",typeof(ISimple))]
public class SimpleHello : ISimple
{
[Export("Message")]
public string Message
{
get { return "Silverlight rocks!"; }
}
}
[Export("SimpleBello",typeof(ISimple))]
public class SimpleBello : ISimple
{
[Export("Message")]
public string Message
{
get { return "C# rocks!"; }
}
}
public class SimpleMultiCat
{
[ImportMany("Message")]
public IEnumerable<string> Messages { get; set; }
}
public class SimpleCat
{
[Import("SimpleHello")]
public ISimple simple { get; set; }
}
class Program
{
private static CompositionContainer container;
static void Main(string[] args)
{
AggregateCatalog catalog = new AggregateCatalog();
catalog.Catalogs.Add(new AssemblyCatalog(Assembly.GetExecutingAssembly()));
SimpleMultiCat cats = new SimpleMultiCat();
SimpleCat cat = new SimpleCat();
Program.container = new CompositionContainer(catalog);
try
{
Program.container.ComposeParts(cats);
foreach (string message in cats.Messages)
{
Console.WriteLine(message);
}
}
catch (CompositionException ex)
{
Console.WriteLine(ex.ToString());
}
Console.WriteLine();
try
{
container.ComposeParts(cat);
Console.WriteLine(cat.simple.Message);
}
catch (CompositionException ex)
{
Console.WriteLine(ex.ToString());
}
}
}
}