Couldnt Find A silent way of installing FL Studio 5 fully (because of collab) so i made this script (my fisrt ever) and seemed to work perfectly. put this in the same dir as fl studio and run this script (compile it first using auto it)
i can get it to install after extracting it from the zip files using: 3dsmaxsetup.exe /quiet but have to register it after as it installs the default serial number