If you've been pulling your hair out trying to figure out how you could possibly play Guitar Hero on the Nintendo DS, here's the scoop. Guitar Hero: On Tour, due this summer, includes a 4-button controller that plugs into the GBA slot on your DS and includes a special pick stylus you'll use to strum notes on the touch screen. No word on whether you'll be able to lefty flip. Check out this brief promo video if you can't quite visualize how it works and want to see it enacted by goofy teens who look like they should be marketing a breakfast cereal:
