Thanks, Grim and Reghacker.
While I continue to research, I've installed Fences, which is actually pretty nice.
But, this has become a crusade for me. Over the years, as Windows progressed from V 2.0 (yes I'm old

) to V 7, MS's arrogant "we know best" attitude has been a constant annoyance. For them to abandon something that worked well in previous versions, that IT pro's have come to rely on, is flabbergasting.
Another example is the missing "up one level" button. Sez MS: " The breadcrumb is better, just use that" - but why force us to use ONLY the breadcrumbs? It is NOT always better, and telling us to use Alt-uparrow is just another example of arrogance. It's things like this that caused me to stick with XP until now (proud to report that none of the ~ 30,000 desktops over which I have influence run Vista). I've finally bit the bullet and installed Windows 7 into a second drive on a test machine. One reason I did was the reports of fabulous stability. But - hah - within 1/2 hour of the install I got my first explorer crash - this on Jan 2009 hardware that was Vista Certified and has has run XP flawlessly for 6 months, and is running the latest Windows 7 versions of all critical
drivers, Windows updates, BIOS, etc. ! I can make it crash pretty much anytime I want - just right-click on the Desktop after it has been up for a while, and about 25% of the time the crash will happen.
I've been ignoring the crashes, but that's just one of many frustrations. I had really looked forward to Aero - not really needed to get my work done, but it looked slick and cool. BUT - no matter what I've tried, I can't get any Aero theme to allow me to set the background for explorer windows to anything but horrible, glaring white. My eyes cannot take that, so I've been forced to revert to the Classic theme, where it is easy to set the background to any color desired. On this and other forums the consensus is "sorry - most people like white backgrounds, just live with it." AAAARGH.
Oh, well, sorry to vent. Just disappointed - I had so very much wanted to like Windows 7. Now it's just another item in my daily set of problems I have to solve.

Life in IT changes but stays the same ...
Call it instinct, but I just *know* there is an obscure registry setting that will allow a particular Explorer window to retain it's customization. I'm not giving up.
Raargh