Oh ok great! If you're a pro with AutoHotkey, then it's even better as it won't show a console window.
You enter the parameters right after the executable path in the Command field. Make sure you enclose the path in double quotes and then enter the parameters. e.g.
"C:\Windows\Nircmd.exe" emptybin
You can also use %1, %2 etc. %1 is the path of the current folder. Keep in mind that if the current folder is a root of a drive it will end with a backslash (like C:\) %2 is the path of the selected file (only when a single file is selected). Rest of them are documented in the help file.