Positioning question with System Monitor multicore CPU

-I can't position the memory diagram/text before the CPUs

Section [core] set the value dock into right. This defines the side where to show cores. BTW here is doc

-Even if I want to use a background (simple legend like CPU0: CPU1: MEM: before the percentage texts) the background gets positioned where the PHYS_USED starts, so no background goes behind the multicore diagrams.

I'm not sure, but I guess it is possble to use the [image#] section to make something like background (see the doc). This is just an image and it can be drawn into any position and overlay the cores.