Add shortcuts for media keys (for keyboards that have no media keys).
You need AutoHotKey to use the .ahk file, or just simply download & run the .exe file.
Previous Song: Shift+Alt+Left
Next Song: Shift+Alt+Right
Volume Up: Shift+Alt+Up
Volume Down: Shift+Alt+Down
Pause/Play: Shift+Alt+Space
Mute: Shift+Alt+Add(Numpad)