Somethin's telling me you're working harder than you need to, let's see if we can save you some work.
Playing Now is the special per zone playlist; it is the list of tracks you are currently playing (in a zone).
Playlists aren't how MC
manages files - they are managed internally via a database.
Your tracks are ripped, and located under the folder listed in Tools > Options > File Locations > Audio, depending upon your folder and file rules listed there also.
For the future, you can setup MC to rip to the external HD directly - there's no reason to rip and then manually move. If you're going to manually move, you'll want to do a little more reading:
http://wiki.jriver.com/index.php/Moving_FilesYou can use MC's Rename, Move & Copy tool.
Now, to get that list of files, in case you're still needing this, try entering this in the Search dialog:
[Media Type]=[Audio] [Date Imported]=<4d
This says, select audio files imported in the last 4 days. Change it to suit your needs; easiest using the Search Wizard.
There's also a CD database which you can list/search to see exactly which CDs were imported and when.