The Assemblies page

Windows Installer version 2.0 has the ability to install .Net and Win32 assemblies. These are installed as side-by-side assemblies on Microsoft Windows XP. Side-by-side assemblies allow applications to safely share assemblies avoiding previous issues with assembly sharing, such as DLL conflicts. Side-by-side assembly sharing enables multiple versions of a COM or Win32 assembly to run simultaneously on the system.

Adding an assembly

Use the [ Add Assembly... ] toolbar button, the "Add Assembly..." context menu item, or press the Insert key. A File Picker dialog will appear, where you can choose the first file of your assembly.

Removing an assembly

Use the [ Delete ] toolbar button, the "Delete" tree context menu item or press the Delete key.