The upper IMG takes more to get to than the lower does. Don't mess with the injectors on this one.
EGR definitely needs to come loose from the flow pipe.
I used bunjee cords galore to keep the intake manifold up but since you leave the injectors/rails/fuel line connected you'll only have a few inches of space between the manifold and cylinder head.

you may want to power wash around the lower IMG to get all of the dirt and mud that collects there out. You don't want that stuff falling in your engine.
Your engine may be cleaner than mine was/is. I wouldn't be surprised.

Joe is right about some of the bolts being hard to get to. I had a variety of extensions on hand and a flex socket that really helped.

--jeremy