Ninject WCF extention with already existing ServiceHostFactory and ServiceHost

Question

We have a difficulty to use Ninject wcf extensions. We host our services in IIS and using svc files. We have read a lot of posts describing usage of NinjectServiceHostFactory(in svc files) with NinjectHttpApplication (in global.asax file) and it seems very simple. Our problem is that we already have our custom ServiceHostFactory and ServiceHost.

Can someone point us what is the right way combining our ServiceHostFactory with NinjectServiceHostFactory?

Our svc files point to the our custom ServiceHostFactory.

UPDATE

It seems that we managed to implement it. Our ServiceHostFactory implementation:

public class CustomServiceHostFactory : NinjectServiceHostFactory
{
    protected override Type ServiceHostType
    {
        get
        {
            return typeof(CustomServiceHost<>);
        }
    }
}

Our ServiceHost implementation:

public class CustomServiceHost<T> : NinjectAbstractServiceHost<T>
{
    public CustomServiceHost(IServiceBehavior serviceBehavior, T serviceType, params Uri[] baseAddresses)  : base(serviceBehavior, serviceType, baseAddresses)
    {
        ...
    }

    protected override void OnOpening()
    {
        ...

        base.OnOpening();
    }
}