I tried out the boot code driven OnBoot list and it works great... however I was soon stumped by the issue of separate OnDemand items. I want to set up a tcl which starts a winxp Virtualbox guest but with nothing else. This requires me to remove all OnBoot items except VBox sound and so on, as well as all OnDemand items so as to get a bare bones OS for VBox to run in.
So I would like to suggest a separate boot code for the OnDemand list to complement the OnBoot list.