If I remember correctly, it doesn't seem like it was too hard to get it in place. The trouble was trying to get it to stay there! And splinting the leg in a manner that would hold up. The chick could get around fine but when I removed the splint or it managed to remove the splint it just went right back out. I think I left it splinted for 3 days. Then a week. Then 2 weeks. I don't think I left it splinted for longer than that, but it was several years ago. I know I found either an article or a thread about it on BYC and that is how I figured out what to try.
Good Luck!