A listen.pls file is usually played by shoutcast/winamp player and as you can not embed winamp into a page then another way will have to be used. without wanting people to add codecs to windows media player you could try the options below.
Code:<a href="http://youraddress.com/listen.pls">Click Here to Listen</a>
this give a link that once clicked will open the stream in a
suitable player that the listener has i.e. Real Player
Another option is to use this code to place an embedded quicktime player onto your page..
Code:<OBJECT CLASSID="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"
CODEBASE="http://www.apple.com/qtactivex/qtplugin.cab"
WIDTH="320" HEIGHT="16" >
<PARAM NAME="src"
VALUE="http://youraddress.com/listen.pls" >
<PARAM NAME="autoplay" VALUE="true" >
<EMBED
PLUGINSPAGE="http://www.apple.com/quicktime/download/"
SRC="UNeedQT.qtif" TYPE="image/x-quicktime"
WIDTH="320" HEIGHT="16"
QTSRC="http://youraddress.com/listen.pls"
AUTOPLAY="true" >
</EMBED>
</OBJECT>
the second choice would be better and auto starts when you visit your page... If the listener has not quicktime installed it will offer to take them to a page to download it. For both of the above codes you would need to change the address to yours.. (note the second option has the address in two places... you need to change them both.)
Hope this helped
