HELP! I just recently did my first family photo shoot for a friend of mine. I shoot in RAW. I am currently in the process of editing the photos in LR3. Im going to edit all the photos, export to cd and give her the cd. She told me she is wanting to get atleast one picture I know of blown up to a 16x20 print. My question is -- when she goes to print these photos, how can i be sure they are going to turn out looking great? not pixelated or blurry etc? I know she will get prints done in several different sizes as well. 4x6, 5x7, 8x10, etc. I have cropped several of the pictures, will this make a difference? OR do i need to change the resolution in the export tab? I've read 300 ppi for all sizes for print? As you can tell, im very new at this and want to make sure I get it done right for her. thanks in advance!