$target = "BMP";
$current = "JPEG";
$Config{'Options'}{'Converted File'} = "converted.bmp";
$Config{'Conversions BMP'}{'JPEG'} = 'convert "$infile" "$outfile"';

    my $ofile = $Config{'Options'}{'Converted File'};
    my $cmd = $Config{"Conversions $target"}{$current};
    $cmd =~ s/\$infile/$filename/g;
    $cmd =~ s/\$outfile/$ofile/g;
    system $cmd and die "Error converting $filename -> $ofile: $!\n";