you might need to open a socket to read the np data from the website.. but it wouldnt pick up every time the song changes so you'd have to do it manually when you want it to advertize, either with a timer or a !command or whatever.

this works for me...
Code:
alias adv_rp {
  sockopen advrp www.hitzradio.com 80
}
on *:sockopen:advrp:{
  sockwrite -tn $sockname GET / http/1.1 $+ $crlf $+ User-Agent: radioplayer (compatible; MSIE 6.0; Windows NT 5.1) $+ $crlf $+ Host: www.hitzradio.com $+ $crlf $+ Connection: Close $+ $crlf $+ $crlf
}
on *:sockread:advrp:{
  var %s | sockread %s
  if (*<span id="nowplaying">* iswm %s) echo 4 -a * radioplayer: now playing: $gettok($gettok(%s,3,62),1,60)
}