This is a late addition to the Frontdoor memory requirements when running
it as a Windowed or icon and your batch processor starts up FDNC...


I have tinkered with the memory settings in a new pif and here is what
finally worked with memory while running FDNC in a window and ICON...


In the Pif file
              REQUIRED     DESIRED
Dos memory    468           -1
XMS           640           -1
EMS            0            -1

Do not lock the memory on the advanced page and
Check the box  Emulate Text mode for Monitor Video Port

All these settings are in this zip file in a file called 
DHB.PIF...

Hope this helps!
David