Script to pipe SSH output to a text file

Hi,

I work for an ISP and we often have to look up data on a customer's cable modem. To do this we create a session to the CMTS using SSH (via Putty) and run specific commands to return pieces of data.  What I would like to do is create a script to :

• Run an instance of Putty an open a SSH session.
• Provide username and password (as parameters) to begin the session.
• Run commands using variable parameters.
• Display the outputs on screen and pipe the resulting output to a text file (if needed)
• Also, would like to append multiple outputs ( from the same session) to the same text file.

Any assistance with this will be greatly appreciated.

Thanks

Chris W.