In most cases you have to use a template like  starting from CLI 
when configuring the utility.

If the utility does not open a window, you have to use the "-w" option.
If the utility seems to hang up after starting ZShell, try the "-d" option.
With "-d" you do not need a "-w" option.
Example:  zshell -wCON:1/10/640/100/ZShell -d

Some special programs:
YAK: Use "zshell -d" as argument of a hotkey-definition.
MachV: EXECMD"zshell -d"
MTool: Define a program with "zshell" as program and "-d" as parameters.