[opensuse] openSUSE 11.1 "GNOME_STABLE_2.26" Zypper Priority Settings

Hello friends, I updated my previous openSUSE 11.1 Gnome 2.24, to latest 2.26.3, by adding the specified repos to zypper, as per openSUSE directions: http://en.opensuse.org/GNOME/2.26 Currently both GNOME_STABLE_2.26 as GNOME_Backports, have priority set to 19, in order to take vantage against updates repo, which is set to 20 as per default. Wonder if: 1- have I to maintain the higher priority to GNOME 2.26 repos over all the others, or can I switch them down to 99? 2- have I to use "zypper dup" whenever I wish to upgrade my GNOME, or it is necessary only the first time? BR, -- opensuse 11.1 - Linux 2.6.27.29-0.1-default x86_64 AMD Turion(tm) 64 Mobile Technology MK-36 - GeForce Go 6150 Gnome 2.26.3