[CentOS] Lost path to root directory!

I'll admit I am new to LVM2, but I have got myself in a bad spot.

I renamed the LVM volume and volume group so that I can keep track of what is in them. I have changed grub's menu.lst, /etc/fstab, and /etc/mtab, but somewhere else there is still something telling lvm that my root drive is on VolGroup00. Where is it, and how do I convince it that VolGroup00/Volume00 (or whatever the defaults are) is now DriveC/Centos? I suspect it may be hiding in initrd (compressed). Wherever it is, it brings the boot process to a screeching halt with a kernel panic when it tries to pivot mount the root drive.

Until I get this figured out, my Centos install is dead, and I am back on my old Mandrake install.

Ted Miller