I would like to suggest some more documentation on NetInstall. I had some problems, and found this page http://64.233.179.104/search?q=cache:8CpDqpF_oA0J:www.sdwug.org/proj/ConfigMikroTik%3Fversion%3D5+Mikrotik+net+install+"waiting+for+installation+server"&hl=en to be of great help. While the problem was that I plugged the path cord into the wrong port on the hub, I was left completely clueless with the MT documentation.
Did you look here?
http://www.mikrotik.com/docs/ros/2.8/guide/netinstall.frameset
Been there, and it was of little use. It appears to be directed at the Routerboard, and doesn’t provide the level of detail that the other URL I gave does.