And another very much faster way to get the MP3's
into the dialog is by using
/loadbuf -o <dialog> <id> <filename>
Then to remove the file's path, use this while-loop after loadbuf:
set %tmp 1
while (%tmp <= $did(<id>).sel)) { did -o $dname <id> %tmp $nodir($ifmatch) | inc %tmp }