There is a registry hack that makes Windows 8/8.1 Start Screen Tiles to open a new instance of a Desktop App (see accepted answer of this question: How to make a Start Screen icon for Notepad that will always open a new Notepad when clicked in Windows 8?)
Unfortunately this doesn't apply to the search results in the Start Screen. Is there a (registry) hack so that when I hit the Windows key, type "note" and press Enter to open the first result (usually notepad.exe) and Windows opens a new instance, just like it does in Windows 7?