[PC-BSD Support] Network install media

[mhca12]

Hi,

I don't think I was able to find install media that'd fit a
cd which allows me to do a network install of pcbsd.

Should I use FreeBSD -boot.iso and extract some of the tarballs
manually?

The machine I was trying to install on doesn't boot from usb
mass storage even though it's supposed to and I didn't want
to waste a DVDROM.

What's the suggested process?