Windows Resource Monitor is a nice (and built-in) tool providing a fast overview of resource utilization. On a server with Hyper-V installed, it correctly shows the CPU and disk activity generated by the virtual machines, but somehow they are excluded from the memory load statistics. Is there a way to include them?
The Performance Monitor has the information you want. And, no, there's no way to modify the Resource Monitor to display what you want.
I also think that you're mistaken. The CPU usage of guest VMs is not reflected in the Resource Monitor, though the disk usage is.