c:\@Work\Perl\monks>perl -wMstrict -le
"my $curdir   = 'Y:\Music\Schubert\Lieder\Terfel';
 my $startdir = 'Y:\mUsIc\\';
 ;;
 my $plsname = $curdir;
 $plsname =~ s/^\Q$startdir\E//i;
 $plsname =~ s/\\/_/g;
 $plsname .= '.pls';
 print qq{'$plsname'};
"
'Schubert_Lieder_Terfel.pls'