You can just unbolt the EGR valve and leave it be. Just use a new gasket when you re-install the UIM.
The injectors come right out and my o-rings were still in good shape at about 75K on them. It's easier and better to clean the LIM with the injectors and fuel rail taken off. When you opt. your LIM, hose the screws down with WD40 or something to make it easier.
