switches can be used to install things silently, such as \qn or \s depending on what the installer uses.
Installing FOG on the cloud would mean uploading and downloading multiple gigabyte images repeatedly, which is not going to be a great experience.
there are other pieces of open source software that is written specifically to silently install software on windows/Linux clients.
Personally I don’t use snapins, I use other things to distribute my software. There are many options to look at.