...that there was a way to get the CPU meter on the taskbar to show all cores instead of one. Does anyone know what the tweak is?

From the SONAR 8.5 Users Guide
 
Multiprocessor load balancing
SONAR’s audio engine has enhanced multicore performance and load balancing.
The CPU meter in the status bar shows the peak processor with an average indicator for all
processors. To see all processors, refer to the CPU meter on the Large Transport toolbar shows.
To specify the CPU meter mode
You can specify how the CPU meter appears in the status bar on multiprocessor systems by adding
this line to the [WinCake] section of the Cakewalk.ini file:
[WinCake]
CPUMeterMode=0
The value determines the CPU meter mode:
0 = The peak thread load is displayed as the bar and a yellow indicator shows the average of all
audio threads. This the default mode.
1 = The average audio thread load is displayed as the bar and a yellow indicator shows the peak
thread.
2 = A bar is shown for each audio thread. This is the same display as previous versions of SONAR.
To view and edit the Cakewalk.ini file, choose Options > Initialization File.
For more information about the Cakewalk.ini file, see Initialization Files.

Thank you! Couldn't remember the process, and the terminology. Works like I want it to now.