A bit more info...
I have followed through the video tutorial - no problems, all fairly straight-forward - and saved my own Performance file and checklists to a 'clean' (default) FDC setup - i.e. without any other 3rd. party stuff. This created new four files B7374-FS9 (the name I chose) in the 'User' folder (.ucl, .ufs, .uir & .urp) and one in the main Data folder (.uco).
But when I go to 'Select Aircraft' and choose the new entry, (User: B7374-FS9), and then start FDC in FS9, it's not the new B7374-FS9.ufs file that is read out (my saved checklists in the user folder) but the default FDC file "Boeing 737-400.ufs" in the main data folder.
Am I doing something wrong? How do I get FDC to read out the checklist I have just edited and saved as per the video tutorial? Or should I just make a backup of the default Boeing 737-400.ufs file then rename my own file as that, over-writing it (that's not how it should be done though, I am sure!)?
Martin