I'll give it a go, but I'm compiling drivers on one machine to be used on another....so how do I avoid trashing my precious Nvidia drivers and the kernel on the core?
I'm guessing that this has to be done in the folders for the diskless image?
No this will not damage your existing nVidia drivers or your Kernel. The process just builds the new libs/pkg's needed for the Unichrome Pro installer. It will not install the Via drivers on your Core... it will build and installer ready to be used on your Via though. Its safe to do on your core. Just login into a console on your core or ssh into it on your network from anothe machine and go to the /usr/src directory;
cd /usr/src <return>
then download and build everything from this directory as described in the Via pdf. You will end up with a directory called;
you can then cp that directory to your /home/public/data/ directory so that when you have added your Via you can access the installer by ssh'ing into the Via based on its lmce MD ID ie ssh MoonXX (where XX is the ID of your Via based MD found in Web Admin)