I have, say, 6-month-old packages installed on my system.  One day, I
decide I want to update, say, xine-ui.

What (on earth) should I do?

I tried "make update" (although I know it does NOT work - and it didn't)
and sooner or later, the system complains "xxx is already installed -
perhaps an older version?" - why doesn't it _update_ the package as I
told it to do?

So, HOW do I update installed packages without first removing all packages
and then installing everything from scratch.

Thank you.

  -jm