You can download the RBWar Target Flanders kneeboard map from HERE
Unzip this map to the multi folder of RB3D usually located at C:\SIERRA\RedBaron3D\Data\Multi. NOTE: rename your mpkbd1.bmp file that is already in the multi folder (for example, rename mpkbd1.bmp to orig_mpkbd1.bmp, etc.) so you don't overwrite them with these customized Red Baron War maps. To go back to your original kneeboard maps, just delete or rename this custom Red Baron War maps in the \Data\Multi folder, and then rename your original map in the \Data\Multi folder back to mpkbd1.bmp.

Flanders planning map