I mountain bike quite a bit, and I was wondering which manual settings would be best for bikers going at fast speeds. It always seems that the subjects are always blurry. I use a PowerShot S410 Digital Elph, and some of the manual settings are limited. The ISO's max. is 400, and most of the pictures are taken outdoors with lots of sun. What settings would you suggest, and should I let the ISO stay on auto? Also, if I were to get a new camera, what camera would you suggest for action pictures?