How do I care for my salt water pool in the cold winter months? Since,
the system will not function in colder temperatures. Do I use
chemicals as I would in a regular pool or shock it? I plan on running
the filter system for about 6 hours daily and i do have a freeze guard
on the heater. Any other suggestions?

Closing a "salt water" pool ?
http://forum.doityourself.com/showthread.php?t=232368
This discussion may help:

This search string in Google yeilds 271 results:

"salt water pool" winterize OR close
://www.google.com/search?q=%22salt+water+pool%22+winterize&hl=en&lr=&start=20&sa=N

This search string yeilds 567 results:

"salt water pool" maintenance winter
://www.google.com/search?hl=en&lr=&q=%22salt+water+pool%22+maintenance+winter&btnG=Search

Hope this helps.  From reading, there are too many variables for me to
advise you specifically. Your local pool supply store should be able
to assist you as well, be sure to take in a water sample.

~~Cynthia