Custom Resource Manipulator is a GUI-friendly trigger library and UI addition dependency created and distributed by Alzarath that adds custom resource icons and labels that can be created and manipulated.
It should be noted that this is not a true resource and can not be used directly in data. You'll need to use triggers.
The 4 standard resources--Minerals, Vespene, Terrazine, and Custom Resource--have custom resource entries set up by