The mounting bolts for the IAC are obvious, you may have just missed them. You can even see the top bolt in your picture. It bolts right onto the UIM. If you have a mirror you can stick down there, it may help you locate them.
The EGR is the silver saucer like thing that stands on top of your UIM. Again, when doing the UIM cleaning, disconnet this valve and give the port a thorough cleaning.
Just dive into the cleaning. Its not that bad. Just take your time and do everything step by step. Give yourself at least a full day to do it your first time.
