title: installation of firebird with inno setup
body: <p>I'm trying to install firebird along with my application using Inno Setup but I have two problems that I haven't been able to solve:</p>
  
  <ol>
  <li><p>When there is already Firebird installed in the computer, a message pops up during installation: <code>"An existing firebird xxx server is running. You must close the application or stop the service before continuing"</code>. How do I ignore this if you already have installed the Firebird? I tried several flags, more remains to message.</p></li>
  <li><p>How do I get the installer to wait for the Firebird's installation to complete and only then run the application? Because the way I'm doing, it starts installing Firebird in the background, just do not expect to complete, and if the user has to click to open the program at the end of the installation, will give an error because the system still could not open the database because the firebird is still being installed in the background.</p></li>
  </ol>
  
  <p>How to solve these two problems?</p>