Lazarus
From WPKG | Open Source Software Deployment and Distribution
This is a silent installer and deinstaller for Lazarus IDE. [1]
<package id="lazarus" name="Lazarus" revision="1" reboot="false" priority="0">
<check type="uninstall" condition="exists" path="Lazarus 1.0.14" />
<install cmd='%SOFTWARE%\Lazarus\lazarus-1.0.14-fpc-2.6.2-win32.exe /sp- /verysilent /norestart ' />
<remove cmd='c:\lazarus\unins000.exe /verysilent' />
</package>