I've tried running them as part of the kickstart process, but when I boot the system afterwards, it comes up with:
"Failed to start the X server (your graphical interface). It seems that the pointer device (your mouse) is not set up correctly."
And Xorg.0.log says:
No core pointer
Fatal server error:
failed to initialize core devices
I assume that because kickstart doesn't operate in graphical mode, X wasn't available during the VBoxAdditions and so it didn't work right. I'm not the world's greatest X expert, though...
Is there a way to install the VBoxAdditions as part of a kickstart? Anyone tried this? Not the end of the world if it's not possible...