Forjonny
That is why I suggested 01, 02. 03 and so on to precede the names of your MP3 files because with this method you can continue renaming until you reach 99. Or if you start from 00 to 99 you will have 100 MP3 files on your CD.
Again, if you start from 000 to 999 likewise you will have 1000 sequentially renamed MP3 files available.
Now, I realise that renaming files one at a time is a pain but if you go over to
Zdnet.com you will find "file renaming" utilities which you can download and use during the "free trial" period.
UK Bob