Wow..I'm real scared right now. I am new to photography and I'm almost certain that the level of equipment is far better than my level of knowledge. Canon Digital Rebel XT shooting with a Canon 75-300mm 4.0-5.6f lens. So I offered to take some pictures of my friend's daughter (homecoming) from the sidelines of the football field tonight...not a good idea. I tried about 5 or 6 different settings and only got a couple acceptable shots... I think I would have many more but I did something wrong. I thought since the light wouldn't be great on the field I should set the iso very high (I choose 1600) obviously wwaayy to high!! Now all the pictures are really dark.. I am new to editing, but use Photoshop CS. Is there any way I can switch or edit the picture to compensate for the extra high iso setting I shouldn't have used? Any advice would be helpful... Also..I shot some pictures in RAW format because I thought that might be easier for me to try to correct any mistakes I was making. Now the extension of a few of my pictures is .CS2 Now Photoshop won't open those files. Is there anything I can do to make photoshop open these files?