Advanced Installer allows you to easily create merge modules. Merge modules are the standard way for distributing Windows Installer components and setup logic.
A merge modules is similar to a MSI database but it cannot be installed by itself. It is designed to be merged with an existing MSI database. After you create a merge module you can use it in future Advanced Installer projects, by adding it in the Merge Modules page.
The creation of a merge module requires the same steps taken as creating a normal MSI project. You can author a merge module in an Advanced Installer Merge Module project.
A merge module is just a part of the installation package. After the merge (which is performed at build time), the package incorporates the merge module (the merge module is not a separate part anymore).