Zeriab's F12 Pause Script Modification

[TickTock]

I'd like to request a modification to Zeriab's F12 Pause script. I need a window pop-up asking 'Quit?' with 'No/Yes' options. If you press Yes, the game quits entirely (not the Title Screen even). If No is pressed, the Pause stops and the game continues (as if F12 was pressed again).

I'd attempt it myself, but I can't make out Zeriab's script at all. =/