I now have (I hope) full crawls of the ISE site, and I will carry on to get full crawls of the others. I'm now at the stage where I'm trying to fix problems, such as the prominent message touting a user survey which needs to be removed from every page, and the fact that the nbsp entity is referenced everywhere (it should be a numerical entity). A few more hours of this sort of work will be needed, given the scale of the project (19GB+ for ISE itself).