[CentOS] centos4.2 -raid 1 and grub

hi,

I am having a hard time finding out the correct way...anyway for that
matter, to be able to configure grub for raid 1

my goal is to be able to unplug the data cable to hda drive and make it
boot up from hdc. md0= hda1 and hdc1 /boot	
                 md1 = hda2 and hdc2 /

I need a tutorial for dummies I guess

thx

John Rose