1. Get
iTunes to play the files or else,
2. Get the 3ivx codec to enable wmp to play the file.
3. Do NOT reconvert mp3 or m4a/acc files!!! This will result in a drop in quality. And should you make such a sacrifice for yourself, please do NOT re-share such files on the gnutella network!!! Please don't! (Would you be interested in a 2nd-hand condom ... doubtful ... just as other people do not want disgrace quality mp3's, or whatever! Gnutella doesn't need that type of pollution thank you!)
Everytime you convert into mp3/m4a/oagg/wma then there's a loss of quality due to the process meaning information is thrown away during the re-conversion process. So ... the only reason a person would want to reconvert such a file would be to aiff/wav to burn or else .... laziness; Total laziness! If you want to play a certain type of file then get the correct codec or else a player that can play that type of file without issue. DON'T reconvert! What did I say ... ? Please don't be so ignorant & damage-ful to reconvert such a file .. with the possibility of resharing it.