[ALUG] Copy Evolution contacts, appointments, etc. - how?

I want to copy Evolution contacts, calendars, tasks and memos from one user to another and can find no remotely sensible way of doing it. I tried copying the whole .evolution hierarchy but that seemed to do nothing at all - I suspect possibly because of Evolution background processes hanging on to things. Copying addressbook.db apparently doesn't work according to what I can surmise from a bit of googling. Is there really no way to do this? -- Chris Green