Sidebar + Windows explorer

1- is there a way to "auto-hide" the sidebar (c.f. autohide the taskbar):
moving the mouse to the right(or left!) side of the screen makes the sidebar
popping-up. I once had a similar sidebar made by someone that acted that way.
2-how can I have the explorer window to have two parts? At the left the tree
of drives and maps, at the right the contents of the map (in previous
windows-explorer : knob "MAPS")
FB