I'm not the OP, but I found this thread because my installs kept failing with a cannot find the file specified error message.
My issue was that I was only putting the command line parameters in the box.
Instead entering it like this:
- /option
I should have been doing:
- program.exe /option
This works for "HTTP Path (URL)" install method. I'm assuming installs using the Network Path would need a different command line.