Thanks so much again Ric.
Probably down to my being quite dense in this area I didn't really understand the thing about the three-way link. I mean, if, after having burned tracks to a CD using WMP, you then played that CD in a stand-alone CD player (not mine, I know!) it would obviously play what was on the CD, but are you saying that if, after having moved some files on your PC, you then played it on that PC it wouldn't play as it had done on the stand-alone player? (And if by this stage you're tearing your hair out, Ric, please feel free to just move on!)
Regarding the CD-R disc, for some reason today when I tried it it played successfully, although the tracks didn't play in the order I had sent them to WMP or with the same titles. Here is a screenshot of the files as sent to WMP and then in the order in which they appeared in WMP. The order shown is the same but they don't play in that order and their titles have been changed.
Sorry, Ric. I've just tried to attach two screenshots and it told me that my message exceeded 60,000 characters. Apparently, it was 600,000+. I deleted one screenshot but it made no difference.