Hello,
The files that you download and install can be launched using a
"Launch file" custom action with the following settings :
File to launch : [APPDIR]<name-of-file.ext>
Execution time : When the system is modified (deferred)
If the file needs to run as Administrator you can select this option and also, in the
Execution Options you can specify the desired behavior of the installer when launches the file. The custom action must be placed with sequence after
"Add resources" action group because only after this stage the files will be available.
You can also take in consideration adding your files as
URL-based prerequisites if they are setup files.
If you have any other questions we will be glad to answer them.
All the best,
Daniel