SQL Proxy question

[Mark Sass]

Hi All,
    I am fairly new to Python but have a decent background in programming.
I am trying to write some code to proxy authentications to a MS SQL database
server.  The concept is basically to proxy authentication that uses NTLM or
SQL authentication either encrypted or clear text.  I have done some packet
sniffing to see how the packets work, and it seems fairly straight forward,
but I need further assistance.  Can anyone point me to some M$ doc that
details the packet structure or have some code that already does this?  Your
help is much appreciated.

Thanks,
    Mark Sass