As of the milestone 8 release, it's possible to PXE boot the Tribblix image. You can then run the install script just the same way you would if you had booted from the regular ISO.
This is how to set up the server side of the install.
From the iso image, which you can mount up using lofi:
1. Copy the pkgs directory and solaris.zlib to a web server, rooted at (say) http://my.web.server/0m8/
to your tftp server, preserving the layout. (If you have 32-bit hardware, then you'll need platform/i86pc/kernel/unix as well.)
3. Copy boot/grub/pxegrub to your tftp server. You can put it at the top level and can change the name, but whatever name you use is what you define as the boot file in DHCP
4. Create a menu.lst file for your client on the tftp server, for example
title Tribblix PXE
kernel$ /platform/i86pc/kernel/$ISADIR/unix -B console=ttya,input-device=ttya,output-device=ttya,install_media=http://my.web.server/0m8/,install_pkgs=http://my.web.server/0m8/pkgs/
Yes, kernel$ should be one long line. The blog has probably wrapped it.
By convention, this would be menu.lst.0100144F9EAC84 where that number is the UID (01 followed by the MAC address).
The install_media is where solaris.zlib is retrieved from; install_pkgs is the location of the packages. Note that the install_pkgs location includes the directory name where the packages are located.
As you can see, you can redirect the console to ttya, if desired. (Currently, this isn't carried forward to the installed system.)
Then the system should PXE boot in exactly the same way it boots from an ISO, and you log in and install Tribblix just the same way.
In the future, an automated installation mechanism will be provided.