Adding NIC Drivers to ESXi

I had to build a few ESXi servers to host a few machines which were going to do some data munging,
the application itself was a single threaded app ,
some pretty high end desktops had been purchased before this fact came to light so the desktops were to be reprovisioned as ESXi Hosts and then 4 windows 7 images would be deployed , the desktops would be allocated one pCPU each. We purchased an SSD on which to host the 4 VM's.
once i deployed ESXi the first issue i encountered was the onbourd NIC was not on the HCL and ESXi refused to install. as a temporary fix i installed a quad port NIC which was on the HCL this got the host up and running.

 As this is ESXi i had to use the "vSphere Management Assistant" (which i had installed only a few weeks earlier as i am doing an ESX4.1 to ESXi4.1 migration )
The Intel 82578DM drivers were obtained from
http://downloads.vmware.com/d/details/esx_esxi40_intel_82575_82576_dt/ZHcqYmR0QGpidGR3
the image downloaded and mounted on the vMA
(One Centos root Password recovery later)
The CD device now needs to be mounted on the vMA
sudo mkdir /mnt/cdrom
sudo mount -t iso9660 -o ro /dev/cdrom /mnt/cdrom

CD /mnt/cdrom
cd offline-bundle

vihostupdate --server XX.XX.XX.XX --username XXXXX --password XXXXX --install --bundle INT-Intel............zip

The host must be in maintenance mode in order to complete the install of the NIC