[opensuse] Upgrade method

I'm hoping to do my first upgrade of a Suse system - from 10.2 to 10.3 - and I'm wondering what is the best or recommended method for doing this? I assume the 2 choices are: -Use Yast to upgrade the live system by changing the Installation Source -Boot from the install CD/DVD, run the install program and choose the Upgrade Existing System option (I guess it asks with something like that at some point?). Or is the recommended way to back up your system, install the new version & all your apps from scratch and then restore your data? Cheers, -- Ian gpg key: http://home.swiftdsl.com.au/~imoore/no-spam.asc