The easiest thing to do is to cheat. Here's how to get the most flexibility for later tinkering.

1. Get FreeBSD.
2. Install a <8G, cool-running hard drive as the only drive on a generic x86 box.
3. Install FreeBSD from scratch.
   
   • Assign an IP or use DHCP as needed. Later, you'll want to know what IP the unit has if your console isn't working.
   • During the initial install process, we encourage you to install the recommended packages listed on our components page, especially freebsd-update.
4. Set console to COM1.
   • enable ttyd0 in /etc/ttys
   • echo -P > /boot.config
5. If using 5.x, enable/disable all Interjet-specific hardware settings in the kernel. To do this, modify /boot/device.hints as shown in this patch.
6. Reboot. If you're using 5.x, there is sometimes a boot problem (workaround).
7. Verify that console works (9600,8N1). Verify SSH access as well.
8. Transplant the hard drive, the network card, and the VGA card back into the InterJet.
9. Get on the console with a null-modem cable and your favorite terminal program.
10. Reboot
11. Verify network connectivity
12. Use freebsd-update to patch the system:
    • cp -p /usr/local/etc/freebsd-update.conf.sample /usr/local/etc/freebsd-update.conf
    • freebsd-update fetch
    • freebsd-update install
13. Reboot and verify that everything boots cleanly.