How to upgrade to 4.0 without uninstal

[greenhorn]

I'm running Debian sarge 2.6 currently. Lately realized it's time for an upgrade, but when I type 'apt-get upgrade' -- nothing doing.

How do I upgrade my OS without formatting my hard drive and starting all over again? Newest Version is 4.0, right?

[devils casper]

check this tutorial. dont forget to read comments at the end of instructions.

[greenhorn]

thanks for the prompt answer.

I have a new problem, do I bother starting a new thread?
For some reason none of the programs I'm trying to install are being found when I try to apt-get them.
I checked sources.list and commented out the CD option, so it should be going right to the web mirrors. But she don't....

my two mirrors are: deb http://security.debian.org/etch/updates main contrib
and: deb-src http://security.debain.org/etch/updates main contrib

[devils casper]

my two mirrors are: deb http://security.debian.org/etch/updates main contrib
and: deb-src http://security.debain.org/etch/updates main contrib

there must be a space between "http://security.debain.org/" and "etch/updates main contrib".

deb http://security.debian.org    etch/updates main contrib non-free
deb http://http.us.debian.org/debian    etch main contrib non-free
deb http://non-us.debian.org/debian-non-US    etch/non-US main contrib non-free