Asp.net mvc 3 Html.GetUnobtrusiveValidationAttributes and nested models

Here is the situation. I have some ViewModels that contain nested complex model types. Here is a fragment of one of the models (this is not a complete class):

/// <summary>
/// Defines the overall view when viewing contact details.
/// </summary>
public sealed class ContactDetailsViewModel : BaseViewModel
{
    public ContactDetailsViewModel() : base() { }
    public ContactDetailsViewModel(WebSession webSession) : base(webSession) { }
    public ContactDetailsViewModel(WebSession webSession, string returnUrl) : base(webSession, returnUrl) { }

    #region Contact
    /// <summary>
    /// The contact being viewed.
    /// </summary>
    public ContactModel Contact { get; set; }
    #endregion

And a fragment from the ContactModel class (not complete):

    #region Company
    [Required(AllowEmptyStrings = false)]
    [StringLength(128)]
    public string Company { get; set; }
    #endregion

My problem is that I need to get validation attributes from the nested type of ContactModel model for client-side validation. I use the manual approach in most views because I do not use the * For () helper methods. That's what I'm doing:

@Html.TextBox(
_titleField,
Model.Contact.Title,
new Dictionary<string,object>(Html.GetUnobtrusiveValidationAttributes("Company"))
{
    { "class", "CTextBox" },
    { "style", "width:100%;" }
})

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