In article , wrote:

If there
is a ground wire present, then installing regular grounded outlets
would be simple enough. Has anyone looked?

Not quite.

If there is a ground wire present, *and* it is properly connected to a proper
ground at its opposite end, then installing regular grounded outlets is a
simple solution to the problem. Just because there's a ground wire visible in
the box does *not* mean that the wire is actually grounded.