kickstart installation hangs installing rpms

[sudoyang]

First, I've been doing kickstart for quite some time using RedHat/CentOS (and even autoyast for SuSE and kickstart for Ubuntu). Today, I ran into some strange kickstart hangs on CentOS 5.1 and CentOS 5.2 (both 64-bit). The same CentOS 5.1 and 5.2 kick works fine on some fairly new hardware (dual quad core Intel systems with 32GB of RAM and massive amount of storage). I'm trying this same kick on some older hardware about 2-3 years old (dual Xeons), but I'm seeing "hangs" when anaconda installs the RPMs (each time hanging on different RPMs). Switching to VT2, I can see that Anaconda is still alive but chewing about 25% of CPU and seems to spin infinitely. The machine is still responsive just that the installation of an RPM just won't proceed. I can see that the last rpm installed completed 100% so it should move to the next RPM but it doesn't. Has anyone seen this, yet?

This is my kickstart file:

install
url --url http://192.168.1.1/centos-5.2-x86_64/
lang en_US.UTF-8
keyboard us
skipx
network --device eth0 --onboot yes --bootproto dhcp --nodns --hostname test.test.com
network --device eth1 --onboot no --bootproto dhcp --nodns
rootpw --iscrypted blahblahblahblah
firewall --disabled
authconfig --enableshadow --enablemd5
selinux --disabled
timezone --utc Etc/GMT
bootloader --location=mbr --md5pass=blahblahblah/
reboot
clearpart --all --drives=sda,sdb,sdc,sdd,sde --initlabel
part /boot --fstype ext3 --size=100 --ondisk=sda
part pv.6 --size=0 --grow --ondisk=sda
volgroup xenvg --pesize=32768 pv.6
logvol swap --fstype swap --name=swapvol00 --vgname=xenvg --size=1984
logvol / --fstype ext3 --name=rootvol00 --vgname=xenvg --size=40960
logvol /var --fstype ext3 --name=varvol00 --vgname=xenvg --size=20480
%packages
@core
@base
@virtualization
bridge-utils
device-mapper-multipath
-sysreport
kernel
e2fsprogs
lvm2
perl
ntp
lynx
sysstat
vim-enhanced
screen
wget
net-snmp
net-snmp-libs
...
...
etc.

I've tried installing via NFS as well -- same problem

Any help is appreciated.

Thanks!

[sudoyang]

Just an update. It turns out this hardware cannot reliably run the 64-bit flavor (install hangs on various RPMs). The 32-bit flavor of CentOS 5.2 works flawlessly.