I would try to make then into "branches", which inturn would give you a more natural aquascape rather than using a regular bulk of driftwood. IMO, I would use the first piece from 'Nr2' and the third piece from 'Nr5'. The first can be positioned with the little free-piece on top pointing diagonally towards the front pane, plant densly to leave the front(with the free piece) exposed. The second piece, if you can try sawing it down the middle giving you two seperate branches which can be postioned oposite to the first piece and formed into a V-shaped piece, sort-of like a tree root.
Sorry for the horrible explination, ask if you're having trouble understanding.
Sorry for the horrible explination, ask if you're having trouble understanding.