sorting attached files

hi there!

i want to sort the attached files (upload.module) by name or description. i tried the wonderfull modification here at ... but for me its not working for some reasons.

i was thinking of modifiing the function swftools_wijering_mediaplayer_playlist() (wijering.module, line 277), where the array/object $xml_data is passed. possibly it should be better to do the sorting in $xml_data itself, but i did not find where it is declared or "made".

the structure of $xml_data is

Array
(
    [header] => Array
        (
            [title] => Playlist-Titel
        )

    [playlist] => Array
        (
            [28] => Array
                (
                    [fid] => 28
                    [nid] => 5
                    [filename] => 03 - Songtitel3
                    [filepath] => /files/5/03 - Songtitel3.mp3
                    [filemime] => application/octetstream
                    [filesize] => 4787733
                    [vid] => 5
                    [description] => 03 - Songtitel3
                    [list] => 1
                    [fileurl] => http://localhost/sitename//files/5/03 - Songtitel3.mp3
                    [title] => 03 - Songtitel3
                )

            [29] => Array
                (
                    [fid] => 29
                    [nid] => 5
                    [filename] => 01 - Songtitel1
                    [filepath] => /files/5/01 - Songtitel1.mp3
                    [filemime] => application/octetstream
                    [filesize] => 7331840
                    [vid] => 5
                    [description] => 01 - Songtitel1
                    [list] => 1
                    [fileurl] => http://localhost/sitename//files/5/01 - Songtitel1.mp3
                    [title] => 01 - Songtitel1
                )
        )

)

my question is how to sort the elements of [playlist] for its property [description]. it should be done by "array_multisort" but i don't know how to handel...

or: can anybody tell me how to use interface_sortable.module for sorting attachments... ?
:-)

thanx!