Okay, so probably the last part: Once you've hit your seed, hatch the egg. From its nature/gender/ability you should be able to determine which of frames 40-60 you hit. If not, supposing for instance you hit one that was Jolly and there are a lot of Jolly's, and you can't tell which you got by its ability or gender either, you can go to the IV dude in the Battle Subway and sort of figure out which one it is by figuring out which IVs got inherited. This will be pretty hard since your seed is almost flawless and both of your parents are flawless, but you'll find a frame that gives you what you want very easily. Anyhow, when you've found the frame you're on, figure out the difference between your target frame and the frame you're on, and do the right number of advances (flips between Chatots) to get to that target. If your starting frame is 52, and the target one, the one you want, is on frame 71, you'll need to do 19 advances, or basically look at Chatot's summary 19 times.