Can I put the Junk Yard curtain on the right side of the screen?
Short answer: Yes. Set Dock to: Top or Right in Settings → Junk Yard, or flip it instantly with the dock-position shortcut (⌃⇧D by default).
Yes. In Settings → Junk Yard, set Dock to to Top or Right. On the top it runs the full width of the screen in a row; on the right it runs the full height.
To flip between the two without opening Settings, press the dock-position shortcut — ⌃⇧D by default.