[REQ] How to open a local file on a FMS from External?

[pixi]

Recently I came across the demand to handle a specific file hosted on a FMS from an other, externally opened FM-file.
Utilising the BE- or MBS-Plugin I can run system commands on the server from the client as PSOS to e.g. close the file on the FMS or, for instance, create text files.
But to just open the fmp12-file locally in FM 18 or 19 (both are installed) a system command like "cmd.exe /c "/PATH/TO/FILE.fmp12"" does not work as PSOS but worked when run locally.

Since the way, imho, would be to call a system level script on the server from the remote file I'm looking for the right syntax which works as PSOS.

But I'm open to other ways as well ;o)