You could inherit from GenericContent control. There is a public virtual property called Guid that you can override with a custom one and assign a selector to it. The selector used by Generic Content control is Telerik.Cms.Engine.WebControls.ContentSelector. The control used ObjectDataSource to populate the RadGrid. Here you can override CreateChildControls and subscribe for the Grid events
Inside CreateChidControls you should not call call the base. If you want just to hide the providers list you could call ProvidersList.Visible = false. There is a public virtual property ProvidersList that you can access and override if necessary.
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