Here are the steps to switch Mandriva Linux to Cooker, taken from the Mandriva wiki:
- First, remove media for the stable release : urpmi.removemedia -a
- Add the required media for Cooker : urpmi.addmedia --distrib --mirrorlist 'http://api.mandriva.com/mirrors/basic.cooker.$ARCH.list'
- Update all installed packages : urpmi --auto-update
So far, I haven't noticed a bug, it seems 2010.1 will be one of the best releases ever.