What is the best way to set up Crazy Num Caps Scroll on someone's...

Wait until your target steps away from their desk. Copy the program to their computer and run it with command-line options so no configuration window appears. For example: CRAZY_NCS.EXE /c15 /n20. When your victim returns, their Caps Lock and Num Lock will start toggling randomly and they will have no idea why their typing keeps switching between upper and lowercase.