First I'd like to thank you for a very useful and informative article. This has certainly helped me to get PXE set up on Linux much faster than figuring it all out myself. :)

One thing I'd like to point out is that if you intend on using PXE to deploy an OS to the hard disk of the target computers it is much easier and safer to simply press F12 during POST then muck about with the BIOS settings. F12 should make the machine perform a once-off network boot and saves a huge amount of time when deploying to multiple machines as no other configuration is required. This has long been the standard procedure for 'big-brand' corporate desktop PCs and has been adopted by most white box manufacturers as well.