Server :: HTTP Network Install - CentOS 5.4

I've been attempting to setup PXE/HTTP network installs so we can better handle deployments for new systems. I have a test CentOS 5.4 VM running, and another test VM that I want to deploy 5.4 to. TFTP, DHCP are all working correctly. Apache 2.2.3 config "seems" OK. When I kick off the VM which I will install to, DHCP discovery and IP allocation works, the TFTP server is found, I am presented with a menu option of OS selection.

I choose #1, for my 5.4 but then it immediately tells me:
"Invalid or corrupt kernel image"

/var/log/messages doesnt show anything other than the DHCP OFFER/ACK process and that TFTP client doesn't accept options
/var/log/httpd/error_log doesnt show anything either
Not sure where else to look for diagnosis.
My Apache config directory: /var/www/html/CentOS

Content listing:
[root@CentOS-test CentOS]# ls -la
total 4515700
drwxr-xr-x 4 root root 4096 Jul 9 10:38 .
drwxr-xr-x 3 root root 4096 Jul 8 16:46 ..
-rwxrwxrwx 1 root root 4619468800 Jul 6 15:54 CentOS5.4.iso
-rwxrwxrwx 1 root root 932 Jul 6 17:37 initrd.img
-rwxrwxrwx 1 root root 70 Jul 6 17:37 ks.cfg
drwxr-xr-x 2 root root 4096 Jul 9 10:38 msgs
-rw-r--r-- 1 root root 13100 Jul 9 10:37 pxelinux.0
drwxr-xr-x 2 root root 4096 Jul 9 10:38 pxelinux.cfg
-rw-r--r-- 1 root root 932 Jul 9 10:33 vmlinuz

pxelinux.cfg contains:
0A000000
default
pxeos.xml

My Apache DocumentRoot: /var/www/html/CentOS
Directives:
<Directory "/var/www/html/CentOS">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>

Forgot to add this line from my pxelinux.cfg/default file:
label 1
kernel 5.4/vmlinuz
append initrd=5.4/initrd.img ramdisk_size=16000 method=http:/10.37.129.3/CentOS ip=dhcp

(I think I have found my problem.. 5.4 was in the TFTPBOOT directory, but now that I'm using HTTP, I changed this to be:
kernel CentOS/vmlinuz and append initrd=CentOS/initrd.img) -- question is, will just changing this work?