Customising checkboxes in treeview control

Is it possible to customise the appearance of the treeview control as follows...

1. Only display checkboxes on specific nodes in the treeview. Currently checkboxes appear on every node.

2. Change the appearance of the checkboxes to use my own custom images. For example using a light-bulb image showing the light on or off, rather than the normal checkbox appearance.

To help explain exactly what I'm trying to achieve, I've attached an image.