Mandrake update
# urpmi.setup
(add 9.2 source)
# urpmi urpmi
# urpmi --auto-select
# urpmi kernel
# reboot

another way:
ref:http://lwn.net/Articles/50687/
http://www.pclinuxonline.com/modules.php?name=News&file=article&sid=7018
followed the instructions in Cooker HOWTO and How to Upgrade Mandrake, updated the urpmi s
ources to point to a fast local mirror and executed the following commands:
urpmi.update -a
urpmi --auto-select --no-verify-rpm --auto
urpmi kernel