Forums Scripts & Popups $sfile and multiple file types

- using 6.21

can somehow mirc be forced to using $sfile detect multiple file extensions ?

like example for music:

1.
//noop $$sfile( D:\music\some-artist\ $+ *.wma $+ , *.mp3 )
only finds WMA

2.
//noop $$sfile( D:\music\some-artist\ $+ *.wma *.mp3 )
finds nothing

3.
//noop $$sfile( D:\music\some-artist\ $+ *.wma,*.mp3 )
finds only WMA

and if i use only *.mp3 then mirc only gives MP3, WAV and MID.