Thanks for your quick response, Pete. 
I just took my whole arrangement from previous FS--including all of PM and pmSystems--and transferred it to FSX.  Apparently, the transfer to FSX isn't straight across. 
The button I push to turn off the battery actually clears a bit in x66C7, which then does other things in addition to turning off the battery (not all of them I remember right off).  I guess I have to look at them one at a time to see what they've changed for FSX.  Your monitoring facility in FSUPIC will be a marvelous help in doing that. 
As I start, I'm wondering if the list of available memory you point out in the old FSUPIC is still "available" in FSX.  I wonder if you have a list of memory I can play with without fear of conflict with any other software.  I actually only need 32 bytes or so. 
Second, do you have hard information about the new FSX offsets.  I'm using the old list. 
Finally, do you know of a utility that can monitor many offsets at the same time?  That would really help! 
The process begins...  I'm grateful for your help. 
Thanks! 
Warm regards, 
David