TreeListView with CellEditingTemplate

Hi

I'm trying creating TreelistView(MultiColumn TreeView). reference : http://msdn.microsoft.com/en-us/library/vstudio/ms771523(v=vs.90).aspx

This control extends the TreeView by using GrdiViewColumn for multiColumn. 

Now, I would require support for CellTemplate and CellEditTemplate for this control. But GridViewColumn just support CellTemplate and doesn't support CellEdittingTemplate

Any suggestions are appreciated!

Thanks

Suneel