I ran a search of forum and only found your posting..
If you haven't researched on the web here are a few I found..
http://www.liutilities.com/how-to/connect-a-guitar-to-a-computer/
http://www.pbase.com/dlcmh/how_to_connect_a_guitar_to_a_computer
http://morrismatis.blogspot.com/2007/06/my-laptop-guitar-rig.html
Good luck and keep pickin'