AppleScript for opening selected files in Finder
(copy and paste into your shortcut)

on run
  tell application "Finder"

    set PixlPath to application file id "chrismacke.PixlPath"
    set mySelectedFiles to selection

    if mySelectedFiles is not {} then
      open mySelectedFiles using PixlPath
    end if

  end tell
end run

Screenshot of complete shortcut with Shift P as hotkeys