I've been fiddling around with my new G2, and the My Color Modes Monochrome, Retro, and Silhouette produce some neat photos, but I can't seem to be able to adjust anything (i.e., aperture, shutter speed, ISO, exp comp, etc.) in these modes. Am I missing something? Are all the Panny G cams this way? This severely limits the usefulness of these modes!