I would like to extend back-office(dashboard & tree) in Umbraco 6.x Please introduce some good references about it or explain it. I've watched a move about it but it wasn't good special in extending tree! For example I want a custom tree in back-office like this:
CustomeTreeNode | |---SubTreeNodeA |---SubTreeNodeB
"SubTreeNodeA" & "SubTreeNodeB" can contains sub nodes.