I googled this but i still can't see how you do it...

[Sparda]

Does any body know how you go about making a FreeBSD (or Linux) install CD that is compleatly automated and requiers no user interaction? The idea is that the computer has no monitor or keyboard but has network access. So by default SSH should be enabled with root access (becasue at this point no users will have been setup). Any one have any thoughts?

[sentinel]

http://www.enterprisenetworkingplanet.com/...cle.php/3606721

[Shaun]

http://www.sfc.wide.ad.jp/~watari/FreeBSD/boot.html

That's a bit out of date, you should use mdconfig instead of vnconfig and sysinstall is not in /stand anymore, but most of it still applies.