Re Lightrooom RSP free version: If you are in the UK or Ireland, call Adobe on 0207 365 0733, and choose option 4 then option 0. Ask for Carl Timler. He will get you up and running if anyone can - a real gentleman. I talked to him today from Ireland and he had me sorted in minutes, despite a complex problem. What a joy compared to the US Adobe support system - nobody seems to know what's going on when you manage to get through after unbelievably long delays listening to music. Anyway, all is well that ends well and Carl has restored my faith in Adobe.
I am indebted to Sally Schreiber on the Adobe Lightroom FAQs for her succinct information.
Hope this helps UK and Irish readers. Best of luck to all.
Seamus, you weren't kidding. Emailed Carl, received a reply after 30 minutes and the details for getting licence number after an hour. That's service!