While poking around in the code for the Editor, I have found a solution for something which has bugged me for a long time.
If you find that when printing scenarios the text is not split into 2 columns as it should be, locate the following file in the installation folder:
/Memoir’44 Editor/chrome/content/printable.css
Find line 56 and change it to the following:
-moz-column-count: 2;
Newer versions of IE do not behave well with the column-count property, and this should fix the output.