Sorry I wish I would have noticed this thread sooner, yeah we just ran through something very similar and Bejamin was a huge help <tx again btw>. Me and my partner on the project did a small writeup on our setup,
https://sites.google.com/site/bioxclusterproject/ click on installation notes on the left link bar. This was our little private site for keeping track of what were doing on the project but i made it viewable so you can have a look if you need. I'll switch it back to private in a week or so, so feel free to gleam what you can from it on netbooting. The whole thing is still incomplete as its a for fun side project we work on when we have time. Anyway I'll keep trying to watch this thread so don't hesitate to post if something doesn't seem to work right.