Ok, so I can click package names and install them one at a time.
I got some failures, mostly from content repository. Upgrading from repository (which took me to 5.1.5) appears to have done the CR upgrade without issues, not sure why it didn't work from the tarball, but OK!
I'm very slowly upgrading to 5.1.5 from the repository, hoping that at some point, something will fix my javascript blues so that I can do this in one sweep instead of one package at a time.
