Working with Cisco products is not an everyday event for me, but when I do work with them I want to make sure I backup the config files before I do anything.
To do this you can follow the instructions on this page:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_tech_note09186a008020260d.shtml#tftp
You can also download a free TFTP server at this location:
http://www.solarwinds.net/Tools/Free_tools/TFTP_Server/
Chris May 