[RMMZ] CHANGING THE SAVE IMAGE LAYOUT

I've since done a bit of cursory research into the Save Core's features and plugin commands. Still, even if I haven't done that, I'm not entirely sure what you want to replace the images with? For reference purposes, the help file indicates that the actor options include...

* ============================================================================
* Plugin Parameters: Actor Graphic Settings
* ============================================================================
*
* This Plugin Parameter lets you select which graphic to use for displaying
* the actor party found inside the save menu.
*
* ---
*
* Actor Graphic
*
* None:
* - Don't display any actors.
*
* Face:
* - Display the face graphics for the actors.
*
* Map Sprite:
* - Display the sprite graphics for the actors.
*
* Sideview Battler:
* - Display the SV Battler graphics for the actors.
* - Note: If you have an existing save made before this plugin was
* installed, you may need to save over the existing ones to see the
* Sideview Battler graphics.

...these options.