I found it using a socket logger. Its using a page redirect and a cookie to control "searchTitle"..
let me see if i can get this to work with bit che script... brb..
Send: Return Code: 0x00000000
GET /s/?q=2009&audio=on&searchTitle=on&page=0&orderby=99 HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-ms-application, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-ms-xbap, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*
Referer:
http://thepiratebay.org/search/2009/0/99/100Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; Zune 3.0; .NET CLR 3.5.30729; .NET CLR 3.0.30618)
Host: thepiratebay.org
Connection: Keep-Alive
Cookie: PHPSESSID=a132dbb5d555143e71a97efe194a1040; language=en_EN; searchTitle=1
Receive: Return Code: 0x00002733
Receive: Return Code: 0x00000000
HTTP/1.1 302 Found
Set-Cookie: searchTitle=1; expires=Sun, 11-Apr-2010 02:28:57 GMT; path=/
Location: /search/2009/0/99/100
Content-Encoding: gzip
Vary: Accept-Encoding
Content-type: text/html
Content-Length: 26
Date: Sat, 11 Apr 2009 02:28:57 GMT
Server: lighttpd