title: Behavior of Inno Setup package during silent reinstall
body: <p>I have 2 Inno Setup installation packages. <code>A</code> is dependent upon one or more components in <code>B</code>. Normally, <code>A</code> would silently install <code>B</code> flagging just the components it needs installed. Suppose <code>B</code> is already installed with user selected components. Now <code>A</code> will be installed and needs its usual components from package <code>B</code>. How to ensure this? Can I just run the silent install as usual to only additionally install the needed components if they were not already? Will this remove already installed components if they are not selected?</p>