1: the cmd window can be minimized if you want. the fact of leaving it separate from the ACC server manager application, is a deliberate thing, because it allows to close the ACC server manager once the Server is started (saving resources on the host computer).
2: Minimize ACC server manager or CMD window to tray?
PLS, it could be done to set the path to multiple servers and not an installer, but to copy it to the server thanks. It cannot be used on a classic server.