Sorry if this has been asked before, but I couldn't find any threads about it.

I'm currently running Dapper, Server Edition. How would I go about upgrading it to 8.04 without using APT to download it? Can I do it from the Hardy server CD by adding it to the sources list? Should I do it from the alternate install CD via cdromupgrade, or will that switch to the desktop kernel and install a ton of GNOME on top of my current installation?