Thank you for your reply. Let's use an example, there are two that I can think of. The first is Now That's What I Call Music.
I changed the track names so that they include the track number with no leading zero, then the song name, followed by the artist name in brackets. I then change the artist name in the artist and artists field from the true artist to Now That's What I Call Music because when I haven't done this in the past it has messed up my folder structure in Windows Media Player.
In this example, I would like to add a leading zero to the file name without adding a leading zero to the track number. I would also like to make sure that Vol. 02 appears this way, if it doesn't have a leading zero then one should be added. At the same time, I would need to avoid adding a leading zero to the Disc number. The same would apply to the directory.
Once this has been figured out I will mention the second example.
Thanks for your help.