Ok, so, I know this has been addressed, "why would u want to do this if you have a virtual keyboard?" Well, the answer is because, there are virtual buttons that would be great to provide some feedback
so, i was thinking, isn't there a process that is running constantly, so that when you tap the screen, it plays that ripple effect.
wouldn't it be possible, to go in and change the script so that, in addition to that, the rumble pak (yes, i have owned a ds in the past, that is probably not what you call that) is told to turn on for .2 seconds or something?