I just had top build a WebObjects VM using CentOS for our Dev team so had a chance to go over my instructions. The good news is that a 2nd hard disk is not necessary which makes the procedure a lot smoother. The instruction then, once you have the VM up and running and VMTools installed is:

# mkinitrd -f –with=pvscsi /boot/initrd-`uname -r` `uname -r`

Shutdown the VM. Go into Edit Settings and change the SCSI controller from LSI to Paravirtual. Save and Power up the VM. You should have success.

For an updated kernel, see my previous post.