Not sure why you can't enter a value in the plant config. Is the selected set already created for the plant? Maybe that is why you asked question #2? But doing this conifg can be a tad tricky. In the proposal for inspection point area, enter in the plant first. Go to the field below plant and use the drop down. In the pop-up list you want, drill all the way down to the final code you want and double click on it. The rest of the fields on the right will auto-populate. If this doesn't work for you, we would need some screen shots to see the errors you are getting. There is nothing really special about this config and if you have access security wise, it shouldn't be a problem.
For question #2, no. If you have an existing selected set within a plant, you can copy that to a new selected set and edit it within the plant. But I also don't see any ability to copy a selected set from one plant to a second plant.
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