I always do as Mr. Johnson does, especialy because I like to have and hear different version of the same song, and sometimes I don't have nothing about these songs but it's names.
So, for example, I have some versions of "Mack, the 'Knife'". So I put all the versions in a unique folder and I open this folder with MP3Tag, select all files and renumber it's track fields (Ctrl-K) and toggle al song's names to "Mack, the 'Knife'". Then I do Alt+1 and using this mask "$num(%track%,2) - %title%" (without quotes) I bring the tags contents to the file names.
It results as:
01 - Mack, the 'Knife'.MP3
02 - Mack, the 'Knife'.MP3
what is enough to me.