IBM Thinkcentre A51 hanging when using boot CD

Booting to ZEN boot CD using the manual option. Appears to detect all
hardware and loads properly. Once the BASH prompt appears, the keyboard
is unresponsive. I am running ZENworks 4.01 IR7 on a NetWare 6.5 SP5
server. I thought it might be an issue with the Broadcom NIC, so I
tried disabling and installing an older Intel NIC. Results were the
same. I also tried adding the ACPI=OFF switch to the bottom of my
settings.txt file, but still got the same results. PC information is
below. Any info would be helpful. I have about 15 of these PCs, and I
cannot use ZEN to image. I currently have a Ghost image on a separate
hard drive that I have to connect to each PC if I need to image.


IBM ThinkCentre A51 8131-ALU.
Intel 915 chipset
S-ATA hard drive
Broadcom NetExtreme Fast Ethernet

Scott