Luminis Portal and persistance Cookies and the F5

I don't even know where to begin on this one. I need to look for a cookie that is set on the Servers in a Luminis Portal setup and then based on the Cookie that is set send it to that server on following client connections. the search string can be upto 1000 bytes into the header. Search for the String "fos.web.server=" the next 15 characters are the cookie, lumprodcookie1, or lumprodcookie2 or lumprodcookie3 or lumprodcookie4 or lumprodcookie5, depending on which one it is, the connection will be send to the corresponding server.

service Abe-8008 
  ip address 192.168.217.105 
  protocol tcp 
  port 8008 
  keepalive frequency 30 
  keepalive uri "/" 
  keepalive port 8008 
  keepalive type http 
  string lumprodcookie2 


   content SIS-CPIP 
    string range 1 to 1000 
    string process-length 15 
    vip address 129.15.0.216 
    add service Abe-8008 
    add service Barney-8008 
    add service Maggie-8008 
    add service Moe-8008 
    add service Snowball-8008 
    advanced-balance cookies 
    string prefix "fos.web.server=" 
    port 8008 
    protocol tcp 
    url "/*" 
    balance leastconn 
    active