How do I upgrade from Potato to woody?

What do I need to change in the sources.list file?

My sources.list file looks something like this:
# Uncomment if you want the apt-get source function to work
#deb-src [url]http://http.us.debian.org/debian[/url] stable main contrib non-free
#deb-src [url]http://non-us.debian.org/debian-non-US[/url] stable non-US

#deb [url]http://http.us.debian.org/debian/[/url] stable main non-free contrib
#deb-src [url]http://http.us.debian.org/debian/[/url] stable main non-free contrib
#deb [url]http://non-us.debian.org/debian-non-US[/url] stable/non-US main contrib non-free
#deb-src [url]http://non-us.debian.org/debian-non-US[/url] stable/non-US main contrib
non-free

#deb [url]http://ftp.us.debian.org/debian/[/url] stable main non-free contrib
#deb-src [url]http://ftp.us.debian.org/debian/[/url] stable main non-free contrib
#deb [url]http://non-us.debian.org/debian-non-US[/url] stable/non-US main contrib non-free
#deb-src [url]http://non-us.debian.org/debian-non-US[/url] stable/non-US main contrib
non-free

deb [url]http://ftp.debian.org/debian/[/url] stable main
deb-src [url]http://ftp.debian.org/debian/[/url] stable main non-free
#deb [url]http://non-us.debian.org/debian-non-US[/url] stable/non-US main contrib non-free
#deb-src [url]http://non-us.debian.org/debian-non-US[/url] stable/non-US main contrib
non-free

Thankyou,
Shashank



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