Is it safe to say then, that ultimately, the goal is to be able to print and scan with both printers, correct? In other words, if I can provide those steps somewhat disregarding the registry (I do my best to keep things simple), will that work for you?
Or is it that you are seeking specific files and information as to how and why they are not there, renamed, missing, etc? I should have the answer to one or the other (but in the event you do not reply before I do, just know my goal is so you can simply print and scan, regardless of the method to do so). That is my plan anyway. I hope to have good news for you soon.
Just specify if you would rather have the complicated version or the simplified one as I want to provide the best answer that suits your inquiry.
Always happy to go above and beyond expectations when I can. Thanks again!