MyMPx.org - What is a Win32/Agent.ONB Trojan virus?

I Bought a few shuffle style mini MP3 Players and have had the following problems PLEASE HELP!!!When the MP3 Player is plugged into a USB port on our computer, it is
identified by Windows XP home as two devices :-

1) AMT_CDROM , a read only drive

2) MP3_PLAY, a drive which contains mp3 files to be played by the
player.

The AMT_CDROM drive contains some files which try to run as soon as the
player is plugged in using the Windows AUTORUN function. These files are in
a chip on the player and cannot be deleted.

These files are

autorun.inf

AMT.sn

start.exe

The result of this is that Windows tries to run the file "start.exe", and as
soon as this happens it is flagged by the anti-virus software (NODS32) as
containing the Win32/Agent.ONB Trojan virus

There are some references to this virus on the web, but nothing very useful
which I have found so far - the following has been translated from Italian
on a forum and relates a similar experience.

"Hello everyone I have a question to be asked: I bought an mp3 player
similar to your shuffle from china 2 gi
The problem is that if I connect off with usb cable to PC then turn fits ...
you see, it works and everything is ok ...
But if the spengo and then riaccendo tells me "device not recognized" and
then at the end asks me to reboot the PC.
But the main problem is that my view on the PC in addition to "removable
disk" also similar to a disc player that if I clicked on from the antivirus
(nod 32) recognize a file start.exe. "
"G: \ AMT.sn 'cabinet' BackupTool.exe - probably a variant of
Win32/PSW.Agent horse tr ** a"
the presence of a file infested by trojan.
The result is this: "G: \ start.exe - Win32/Agent.ONB horse tr ** a - error
while deleting - file is locked - error while deleting - file is locked -
error while deleting - file is blocked. "
of course I can not remove in any way .... this disc (AMT_CDROM) despite the
low level formatting does not delete them ... but still active ... I do is
safe to use? You can delete? "

I can't find any details on what the virus does, if it really exists, does.

Has anyone come across this before ? If there is a virus present, it seems
to be encoded into the rom chip on the mp3 player during it's manufacture.

I can't imagine the presence of the virus pattern is a coincidence because
the function of the start.exe must be fairly simple in this use .

Look forward to hearing of any similar incidents or anything else about this
one you can tell me.

Thanks,