title: Registry based components with Inno Setup
body: <p>I'm creating an application for my company. And the goal is to create a universal installer that will be checking user's registry for specific apps installed and according to these apps would create a list of available installation components in "Select Components" window. And that's the particular problem I'm stacked with.</p>
  
  <p>I've already created the installer, but a user have to check/uncheck components he doesn't need because he doesn't use specific app. That is definitely not a good way of doing thing I guess... </p>
  
  <p>So I'm asking for help, please. Could this be implemented through "Select Components" window and how or I should create custom wizard page with checkboxes (again - How)?</p>
  
  <p>Many thx in advance.</p>
  
  <p>P.S. I've already used Check function in my script, but in this case the program automatically installs all of the components related to found apps on users machine, and sometimes users don't need that.... </p>