Change Spotlight’s Top Hit

Create a Automator service like the first answer in this page

Put this text in the "Run AppleScript" action.

activate
set tString to text returned of (display dialog "Type a song title to >search via iTunes" default answer "")

tell application "iTunes" to tell (first playlist whose special kind is Music)
     tell (search for tString only songs) to if it is not {} then play item 1
end tell

Save the worflow.

To create a keyboard shortcut to this service: go into System Preferences -> Keyboard Shortcuts, select 'Services' on left panel

1. Find the importer used to import that type of file.

   mdimport -d 4 -n /path/to/file 2>&1 | grep Imported

   mdimport -d 4 -n ~/Desktop/avatar.png 2>&1 | grep Imported
   2014-06-19 11:17:04.929 mdimport[30911:412893] Imported '/Users/grgarside/Desktop/avatar.png' of type 'public.png' with plugIn /System/Library/Spotlight/Image.mdimporter.
   

   ^{The above example shows the type as public.png in the Image.mdimporter importer.}

2. Open /path/to/importer/Contents/Info.plist in an editor.

3. Find the item of the same type as the type of the file that you found from the above command and delete it.

   

4. Reimport the importer.

   mdimport -r /path/to/importer

   mdimport -r /System/Library/Spotlight/Image.mdimporter
   

Don't forget to have backups and note this procedure may be overridden on OS X updates.