I would prefer the left pane of Nautilus to behave like Windows file manager. It should have expandable/collapsible trees, and if I have /home/mydir-1, /home/mydir-2, I should be able to see them both in the left pane. When I click on one of them, the files in that dir should show in the right pane. If Nautilus can't do it, please suggest a better file-manager which does. I would rather not open 3 panes in Nautilus to do what two panes do just fine in Windows File Manager.

Secondly how can I open two instances of Nautilus? And if it isn't possible with Nautilus, could it be done with some other file manager?