Thanks Ken. I'll keep that in mind.
In the meanwhile I had intended to install the kde4-baseapps port (as you suggest) but made a little error and learnt quite a few things about PC-BSD. I accidentally did this:
Everything runs now, but I will have to do more work to keep it going that way because using upgrade manager now breaks it. I am now doing my homework and getting a grip on the differences in management of ports packages and pbi's. I was making some incorrect assumptions before.