Yahoo IM Packets

Alright, I am trying to interact with Yahoo messenger through packet sending, I was wondering if there are any *UPDATED* packet lists an what information is stored an retrieved from each packet. If not, could anyone possibly help me decode all the packets an make a YIM Packet Stripper(The header) an YIM Packet Parser to parse all the packets so I know what to send when something is recieved. Thanks

Also, anyone know what port yahoo uses to allow connections? :confused:

Anyone?

I have figured out the ports/servers to connect to from my packet logs, just cannot seem to figure out anything else after that. How the connection is made.. What is sent to begin an whatnot.. Someone?