Yes, very pleased - thank you!  Other than a few particulars, in the end it was  still very much like flashing a computer BIOS.  This ROM is just full of  great improvements over the stuff VM loaded us up with.  
Well, at the risk of hijacking the thread... heh...  
When the screen times out with Maps open, and you wake it back up, many  times the map view has gone blank (white) except for the top dashboard  and controls (navigation and zoom buttons, etc.).  Zooming in or out  doesn't help, and neither does going to list view and back to map view.   Often at this point, if you're lucky, Maps will soon throw a Force  Close.  If you're not, you'll usually have to go kill it manually.  This  problem also seems to occur sometimes when you switch tasks and come  back to Maps.
Thanks for being so helpful.  I've tried the process you suggest, on VM stock 2.2.1.  I also tried  uninstalling the updates and just leaving them off.  No love.  Now with  BACKside, it doesn't merely uninstall updates but rather uninstalls the  whole program.   Tried that too.  In both cases I tried deleting the data and clearing the  cache before I started.  Lots of googling, little in the way of answers, it seems.