Just as an update on this... I never did get it working.

However...

I made a new character set for a Marauder/Sorceror combo I'm starting to play and when I copied the mouse repeater keymap from my old set over to the new character set... the cursor works like I expected. But only in the copied version. The original one still does not show the cursor on the secondary screen - and both character sets are in the same XML file. I just thought that was kinda strange.