Silent Install Helper is a clever tool which can help you install multiple applications without seeing any of the usual alerts and dialog boxes. That is, when it works you won't see any splash screens, program licences or requests to choose an installation folder: the applications just end up on your hard drive with the default settings.
To begin, drag and drop your chosen setup files onto the program, and Silent Install Helper will try to identify their type, and list the results. If a setup program is based on a known installer (Inno Setup, Smart, Wise, Nullsoft NSIS, RAR SFX, ZIP SFX, Microsoft, Ghost Install Wizard are supported) then it should be possible to install it silently. But if its "Installer Type" is listed as "Nothing found" then this means it's not been recognised, and you'll only be able to run a standard installation.
If you're trying out Silent Install Helper to see if it works then we'd recommend you remove any unsupported setup programs from the list (right-click each one in turn, select "Delete").
To install whatever programs remain, click Select All > Start. Depending on your installers, you may see brief pop-up messages alerting you that a particular setup program is being launched, but otherwise that should be it. You'll see no dialog boxes, no requests for information, not even a message from Silent Install Helper to tell you the process is over - your applications just get installed.
Alternatively, if you'd like to save this list of programs on multiple PCs (they're all your favourite applications, say), then select the installers and click "Create *.cmd file". This produces a script which you can save along with the setup programs. Copy these to any PC, double-click the "setup.cmd" file and your programs will be installed automatically.