Send you injectors off to Mr. injector, I think he charges 10-15 each to clean and test. The first picture you posted prior to taking off the head was of the cold start injector, since the PCV is plumbed into the upper intake plenum oil vapor coats everything and since the EGR system will heat the intake plenum it bakes the oil to everything inside of the plenum including the cold start injector.
Since you are going through the engine do your self a favor and have the entire intake system hot tanked, also as I mentioned send out your injectors, including the cold start injector for a professional cleaning. You should check the head for warpage, if not all this work will be lost. The 22RE engine is a good little mule, if taken care of it will last hundreds of thousands of miles, while you are working on it clean off as much built up oil and grim as you can, in the end the engine will perform much better. The power difference between a clean intake and injectors vs not is big, not to mention better fuel milage.
Good luck!