Upgrading From CM 4.2 or other rooted ROMS to 5.0.x(Dream/Sapphire) - CyanogenMod Wiki
http://wiki.cyanogenmod.com/index.php?title=Upgrading_From_CM_4.2_or_other_rooted_ROMS_to_5.0.x(Dream/Sapphire)
"This guide will tell you how to upgrade from an older (