NET: Registered protocol family 2

The above is the last thing that I ever saw, I tried pci=routeirq etc.. and it wouldn't work.

The solution is to enable IOAPIC in the VBOX Settings

Just enable "IOAPIC" in the settings for your Centos Guest and you'll find the kernel boots just fine.  I wonder if a physical system might stall in this same way if the BIOS has IOAPIC disabled which many people do as a troubleshooting method.