Task appearance and bar templating with custom data binding in Gantt Chart Library and Project Management Library for WPF

Is it possible to use custom task appearance (as indicated in Custom Appearance sample application) or task bar templating (as indicated in Bar Templating sample application) within the Gantt Chart control from Gantt Chart Library for WPF or Project Management Library for WPF data binding it to a collection of custom task item data objects that do not inherit from DependencyObject (and therefore don't support WPF attached properties)?