Ok.... so there are two ways to replace the jw-flv-player. The lazy way which is the way i did it or the hard way which i won't teach because it takes too much time.
Ok so first download flash player 5.3.
http://www.longtailvideo.com/players/jw-flv-player
Depending on where flash player is installed will differ depending on where you have subsonic installed.
I'm guessing that most of them are installed here.
C:\subsonic\jetty\1802\webapp\flash
My flash player is installed here but thats because i'm running subsonic off of tomcat.
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\subsonic\flash
You should find two files under your flash folder.
jw-player-4.4.swf and
jw-player-5.0.swf. Now rename the
jw-player-5.0.swf to
jw-player-5.0.old.swf and paste the
player.swf that you just downloaded in to the flash folder and rename it to
jw-player-5.0.swf. After you do that you may need to reboot subsonic and also delete your internet temparary files before it will work.
To verify that it worked run the subsonic web page and right click on the flash player and it should say
About JW Player 5.3.1.... or something.
Let me know if it works.
~ Sean K