Hi there DG,
This really depends on the scale of the operation. If it is a couple of domains, then we could do it relatively quickly. It would have to be hardcoded, really as, to be honest, the facility to do this on an account wide basis in the member area is something that would take a large amount of tech time. If you email me a list of domains and what you'd like to appear on there as that is pretty much the only way we could do this for now.